Quotes about theory (2998 quotes, page 2)

“The doctrine of redemption is founded on a mere pecuniary idea corresponding to that of a debt which another person might pay; and as this pecuniary idea corresponds again with the system of second redemption, obtained through the means of money given to the Church for pardons, the probability is that the same persons fabricated both the one and the other of those theories; and that, in truth there is no such thing as redemption — that it is fabulous, and that man stands in the same relative condition with his Maker as he ever did stand since man existed, and that it is his greatest consolation to think so.”

Thomas Paine book The Age of Reason

1790s, The Age of Reason, Part I (1794)

Money , Truth , Idea , Thinking

“As a graduate student I studied mathematics fairly broadly and I was fortunate enough, besides developing the idea which led to "Non-Cooperative Games," also to make a nice discovery relating to manifolds and real algebraic varieties. So I was prepared actually for the possibility that the game theory work would not be regarded as acceptable as a thesis in the mathematics department and then that I could realize the objective of a Ph. D. thesis with the other results.”

John Nash (1928–2015) American mathematician and Nobel Prize laureate

Autobiographical essay (1994)

Game , Mathematics , Idea , Study

“No battle can be won in the study, and theory without practice is dead.”

Alexander Suvorov (1730–1800) Russian military commander

Quoted in K. Ossipov, "Suvorov", 1945.

Study , Dead

“We should continue to use simple models where they capture enough of the core underlying structure and incentives that they usefully predict outcomes. When the world we are trying to explain and improve, however, is not well described by a simple model, we must continue to improve our frameworks and theories so as to be able to understand complexity and not simply reject it.”

Elinor Ostrom (1933–2012) American political economist

Elinor Ostrom (2009) "Nobel Prize Lecture", December 8.

World , Understanding

“I also don’t think that there is really a theory of intelligent design at the present time to propose as a comparable alternative to the Darwinian theory, which is, whatever errors it might contain, a fully worked out scheme. There is no intelligent design theory that’s comparable. Working out a positive theory is the job of the scientific people that we have affiliated with the movement. Some of them are quite convinced that it’s doable, but that’s for them to prove…No product is ready for competition in the educational world.”

Phillip E. Johnson (1940–2019) American Law clerk

Berkley Science Review (Spring 2006), 2008-11-23 http://sciencereview.berkeley.edu/articles.php?issue=10&article=evolution,
2000s

People , World , Education , Error

“Every genus is natural, created as such in the beginning, hence not to be rashly split up or stuck together by whim or according to anyone's theory.”

Carl Linnaeus book Systema Naturae

Systema naturae (1735) (quoted in Ramsbottom 1938:197)
Original in Latin: Genus omne est naturale, in primordio tale creatum, hinc pro libitu & secundem cujuscimque theoriam non proterve discindendum aut conglutinandum.
Systema Naturae

Nature

“During my controlled near-death experiences, I’ve met Sir Isaac Newton, who died back in 1727 as often as I’ve met Saint Peter. They both hang out at the Heaven end of the blue tunnel of the Afterlife. Saint Peter is there because it’s his job. Sir Isaac is there because of his insatiable curiosity about what the blue tunnel is, how the blue tunnel works.
It isn’t enough for Newton that during his eighty-five years on Earth he invented calculus, codified and quantified the laws of gravity, motion and optics, and designed the first reflecting telescope. He can’t forgive himself for having left it to Darwin to come up with the theory of evolution, to Pasteur to come up with the germ theory, and to Albert Einstein to come up with relativity. “I must have been deaf, dumb, and blind not to have come up with those myself,” he said to me. “What could have been more obvious?””

Kurt Vonnegut book God Bless You, Dr. Kevorkian

God Bless You, Dr. Kevorkian (1999)

Death , Law , Forgiveness

“We now come to the question of applying the observational tests to earlier theories. These theories were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past. It now turns out that… all such theories are in conflict with observational requirements.”

Fred Hoyle (1915–2001) British astronomer

BBC radio broadcast, March 28, 1949. http://www.joh.cam.ac.uk/library/special_collections/hoyle/exhibition/radio/ Reprinted in April 1949 in The Listener, a BBC magazine.

Question , Universe , Time , Past

“The assumption of the contraction of the electron in Lorentz's theory must be introduced at an earlier stage than Lorentz has actually done.”

Hermann Minkowski The Fundamental Equations for Electromagnetic Processes in Moving Bodies

The Fundamental Equations for Electromagnetic Processes in Moving Bodies (1907)

“Our mistake is not that we take our theories too seriously, but that we do not take them seriously enough. It is always hard to realize that these numbers and equations we play with at our desks have something to do with the real world. …The most important thing accomplished by the three-degree radiation background in 1965 was to force us to take seriously the idea that there was an early universe.”

Steven Weinberg (1933) American theoretical physicist

1977
The First Three Minutes (1977; second edition 1993)

World , Idea , Universe

“No theory of government was ever given a fairer test or a more prolonged experiment in a democratic country than democratic socialism received in Britain. Yet it was a miserable failure in every respect. Far from reversing the slow relative decline of Britain vis-à-vis its main industrial competitors, it accelerated it. We fell further behind them, until by 1979 we were widely dismissed as 'the sick man of Europe'…To cure the British disease with socialism was like trying to cure leukaemia with leeches.”

Margaret Thatcher book The Downing Street Years

The Downing Street Years (1993)

Disease , Failure , Country

“The distinguished gentleman who introduced the bill from the committee very appropriately said that it requires us to enter upon unexplored territory. That territory, Mister Speaker, is the neutral ground of all political philosophy, — the neutral ground for which rival theories have been struggling in all ages. There are two ideas so utterly antagonistic that when, in any nation, either has gained absolute and complete possession of that neutral ground, the ruin of that nation has invariably followed. The one is that despotism which swallows and absorbs all power in a single central government; the other is that extreme doctrine of local sovereignty which makes nationality impossible, and resolves a general government into anarchy and chaos. It makes but little difference as to the final result which of these ideas drives the other from the field; in either case, ruin follows. The result exhibited by the one was seen in the United Netherlands, which Madison, in the Federalist, describes as characterized by "imbecility in the government; discord among the provinces; foreign influence and indignities.”

James A. Garfield (1831–1881) American politician, 20th President of the United States (in office in 1881)

1870s, Speech in the House of Representatives (1871)

Age , Idea

“The theories that I (and others) helped develop explained why unfettered markets often not only do not lead to social justice, but do not even produce efficient outcomes. Interestingly, there has been no intellectual challenge to the refutation of Adam Smith’s invisible hand: individuals and firms, in the pursuit of their self-interest, are not necessarily, or in general, led as if by an invisible hand, to economic efficiency. The only question that has been raised concerns the ability of government to remedy the deficiencies of the market. Within academia, a significant fraction of economists are involved with developing and expanding on the ideas of imperfect information (and imperfect markets) that I explored. For instance, Edmund Phelps, this year’s Nobel Prize winner, belongs to this "school" of thought. But in political discourse, simplistic “market fundamentalism” continues to exert enormous influence.”

Joseph E. Stiglitz (1943) American economist and professor, born 1943.

Interview on Bebbe Grillo's Blog http://www.beppegrillo.it/eng/2007/01/stiglitz.html, January 2007.

School , Justice , Idea , Question

“Markets are institutions that exist to facilitate exchange, that is, they exist in order to reduce the cost of carrying out exchange transactions. In an economic theory which assumes that transaction costs are nonexistent. markets have no function to perform, and it seems perfectly reasonable to develop the theory of exchange by an elaborate analysis of individuals exchanging nuts for apples on the edge of the forest or some similar fanciful example. This analysis certainly shows why there is a gain from trade, but it fails to deal with the factors which determine how much trade there is or what goods are traded.”

Ronald H. Coase (1910–2013) British economist and author

1960s-1980s, "The Firm, the Market, and the Law" (1988)

“I am presently at work on a dissertation dealing with the theory of international trade and foreign exchange rates. In dealing with this, studies of the intervention of recent years in the area of trade and exchange rates of different countries is of the greatest importance. I therefore hope to be able to begin a six month study tour to Switzerland, France and England at the end of May this year. After having collected the necessary material I intend — if the economic side can be arranged — during a stay of 6–12 months in England (probably Cambridge) or possibly the United States (in that case probably Harvard University) — to work out the above mentioned dissertation as a specimen for the doctoral degree in philosophy and pursue studies in general. I have not yet any detailed study plan. That should appropriately be set up after the arrival.”

Bertil Ohlin (1899–1979) Swedish economist and politician

Ohlin’s application to the Royal Academy of Sciences, January 30, 1922; Translation by Rolf G. H. Henriksson in "Eureka unter den Linden" in: Bertil Ohlin: A Centennial Celebration, 1899-1999, p. 129.
1920s

Hope , Study , Universe , Country

“Remember, every business firm, like even a mom and pop grocery store, is a market imperfection. A firm is defined in economic theory as a market imperfection introduced to deal with transaction costs. And the sort of theory is that the imperfections, the firms, are kinda like little islands in a free market sea. But the problem with that is that the sea doesn't remotely resemble a free market, and the islands are bigger than the sea; so that raises some questions about the picture. But these market imperfections, like a firm, or a transnational corporation, or a strategic alliance among them, this is a form of administering interchanges. And there's a real question about whether we want to accept that. Why, for example, should the international socioeconomic system, or for that matter our own society, be in the hands of unaccountable private tyrannies? That's a decision, it's not a law of nature.”

Noam Chomsky (1928) american linguist, philosopher and activist

Talk titled "U.S. Foreign Policy in a Globalized World" at Johns Hopkins University, Maryland, March 13, 2000 https://web.archive.org/web/20021220030406/http://www.gseis.ucla.edu/faculty/kellner/ed270/multimedia.html.
Quotes 2000s, 2000

Law , Moms , Question , Business

“The idea that our natural resources were inexhaustible still obtained, and there was as yet no real knowledge of their extent and condition. The relation of the conservation of natural resources to the problems of National welfare and National efficiency had not yet dawned on the public mind. The reclamation of arid public lands in the West was still a matter for private enterprise alone; and our magnificent river system, with its superb possibilities for public usefulness, was dealt with by the National Government not as a unit, but as a disconnected series of pork-barrel problems, whose only real interest was in their effect on the reëlection or defeat of a Congressman here and there—a theory which, I regret to say, still obtains.”

Theodore Roosevelt (1858–1919) American politician, 26th president of the United States

Source: 1910s, Theodore Roosevelt — An Autobiography (1913), Ch. XI : The Natural Resources of the Nation, p. 386

Idea , Nature , Knowledge , Problem

“A work on tidal theory… led me to Lagrange's Mécanique analytique and thereby I returned to those ideas of analysis. All the developments in that work were transformed through the principles of the new analysis in such a simple way that the calculations often came out more than ten times shorter than in Lagrange's work.”

Hermann Grassmann (1809–1877) German polymath, linguist and mathematician

the "ideas of analysis" to which he returned, are those quoted above.
Ausdehnungslehre (1844)

Way , Idea , Time

“To such a one my answer is that I have arrived at a nourishing kernel in that I have learnt that a man is not in any difficulty in making a reply according to his faith which he ought to make to those who try to defame our Holy Scripture. When they are able, from reliable evidence, to prove some fact of physical science, we shall show that it is not contrary to our Scripture. But when they produce from any of their books a theory contrary to Scripture, and therefore contrary to the Catholic faith, either we shall have some ability to demonstrate that it is absolutely false, or at least we ourselves will hold it so without any shadow of a doubt. And we will so cling to our Mediator, “in whom are hidden all the treasures of wisdom and knowledge,” that we will not be led astray by the glib talk of false philosophy or frightened by the superstition of false religion. When we read the inspired books in the light of this wide variety of true doctrines which are drawn from a few words and founded on the firm basis of Catholic belief, let us choose that one which appears as certainly the meaning intended by the author. But if this is not clear, then at least we should choose an interpretation in keeping with the context of Scripture and in harmony with our faith. But if the meaning cannot be studied and judged by the context of Scripture, at least we should choose only that which our faith demands. For it is one thing to fail to recognize the primary meaning of the writer, and another to depart from the norms of religious belief. If both these difficulties are avoided, the reader gets full profit from his reading."”

Aurelius Augustinus (354–430) early Christian theologian and philosopher

I, xxi, 41. Modern translation by J.H. Taylor
De Genesi ad Litteram

Wisdom , Books , Faith , Religion

“There is an ancient Chinese saying "He who labours with his mind rules over he who labours with his hand". This kind of backward idea is very harmful to youngsters from developing countries. Partly because of this type of concept, many students from these countries are inclined towards theoretical studies and avoid experimental work.

In reality, a theory in natural science cannot be without experimental foundations; physics, in particular, comes from experimental work.”

Samuel C. C. Ting (1936) physicist

Nobel banquet speech http://nobelprize.org/nobel_prizes/physics/laureates/1976/ting-speech.html, December 10, 1976

Idea , Nature , Reality , Study

“The move from a structuralist account in which capital is understood to structure social relations in relatively homologous ways to a view of hegemony in which power relations are subject to repetition, convergence, and rearticulation brought the question of temporality into the thinking of structure, and marked a shift from a form of Althusserian theory that takes structural totalities as theoretical objects to one in which the insights into the contingent possibility of structure inaugurate a renewed conception of hegemony as bound up with the contingent sites and strategies of the rearticulation of power.”

Judith Butler (1956) American philosopher and gender theorist

"Further Reflections on the Conversations of Our Time" (1997), which received first place in the Philosophy and Literature Bad Writing Contest

Way , Question , Thinking

“With the publication of J. M. Keynes’s General Theory in 1936 and the mathematical formalizations of his theory by J. R. Hicks (1937) and others, the language of macro-economic theory became systems of simultaneous equations. These are general equilibrium systems of interdependence in the sense that the relationships describe an entire national economy, not just a particular industry or sector. The systems are usually not completely closed; they depend on exogenous parameters including instruments controlled by policy-makers. Seeking definite relationships of economic outcomes to policies and other exogenous variables, qualitative and quantitative, these models sacrifice detail and generality, limiting the number of variables and equations by aggregations over agents, commodities, assets, and time.”

James Tobin (1918–2002) American economist

Source: "Money and Finance in the Macro-Economic Process" (1982), p. 12

Mathematics , Sense , Time , Dependency

“Think of a hypothesis as a card. A theory is a house made of hypotheses.”

Marilyn vos Savant (1946) US American magazine columnist, author and lecturer

Attributed in Proceedings of the Twenty-fifth Hawaii International Conference on System Sciences (1991)

Thinking , Housing

“My theory is that all women have hydrofluoric acid bottled up inside.”

Kurt Vonnegut (1922–2007) American writer

On difficulties with women, as quoted in "Kurt Vonnegut, Writer of Classics of the American Counterculture, Dies at 84" by Dinitia Smith in The New York Times (11 April 2007) http://www.nytimes.com/2007/04/11/books/11cnd-vonnegut.html
Various interviews

Women

“If we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason — for then we would know the mind of God.”

Stephen Hawking book Black Holes and Baby Universes and Other Essays

Last lines. Hawking later wrote: "In the proof stage I nearly cut the last sentence in the book... Had I done so, the sales might have been halved.
Black Holes and Baby Universes and Other Essays (1993)

God , People , Understanding , Question

“This theory argues that artists are useful to society because they are so sensitive. They are supersensitive. They keel over like canaries in coal mines filled with poison gas, long before more robust types realize that any danger is there.”

Kurt Vonnegut (1922–2007) American writer

Wampeters, Foma & Granfalloons (1974)

“The motivationless theory of goods [transfers] can bridge the gulf between history and exact research by securing the important continuity of the research, being linked to both.”

Otto Neurath (1882–1945) austrian economist, philosopher and sociologist

Source: 1940s and later, Otto Neurath Economic Writings. Selections 1904-1945 (2004), p. 278

History

“Fundamental ideas play the most essential role in forming a physical theory. Books on physics are full of complicated mathematical formulae. But thought and ideas, not formulae, are the beginning of every physical theory. The ideas must later take the mathematical form of a quantitative theory, to make possible the comparison with experiment.”

Albert Einstein book The Evolution of Physics

The Evolution of Physics (1938) (co-written with Leopold Infeld)
1930s

Books , Mathematics , Idea

“By abstaining from all definite content, whether as formal logic and theory of science or as the legend of Being beyond all beings, philosophy declared its bankruptcy regarding concrete social goals.”

Theodor W. Adorno (1903–1969) German sociologist, philosopher and musicologist known for his critical theory of society

Source: Wozu noch Philosophie? [Why still philosophy?] (1963), p. 6

Science

“Considering the pervasive importance of quantum mechanics in modern physics, it is odd how rarely one hears of efforts to test quantum mechanics experimentally with high precision.…The trouble is that it is very difficult to find any logically consistent generalization of quantum mechanics. One obvious target for generalization is the linearity of quantum mechanics, but if we arbitrarily add nonlinear terms to the Schrodinger equation, how do we know that the theory we obtain will have a sensible physical interpretation? At least in part, it is the dearth of generalized versions of quantum mechanics that has made it so hard to plan experimental tests of quantum mechanics.”

Steven Weinberg (1933) American theoretical physicist

"Testing Quantum Mechanics" http://www.sciencedirect.com/science/article/pii/0003491689902765, Annals of Physics (1989)

Effort , Parting

“Mathematics, trigonometry, chemistry, psychoanalysis, music, and what not have been related to cubism to give it an easier interpretation. All this has been pure literature, not to say nonsense, which brought bad results, blinding people with theories. Cubism has kept itself within the limits and limitations of painting, never pretending to go beyond it.”

Pablo Picasso (1881–1973) Spanish painter, sculptor, printmaker, ceramicist, and stage designer

As quoted by Marius de Zayas, in 'The Arts', New York, May 1923
1920s, The Arts', New York, May 1923

People , Music , Literature , Mathematics

“The theory of Communism may be summed up in the single sentence: Abolition of private property.”

Karl Marx (1818–1883) German philosopher, economist, sociologist, journalist and revolutionary socialist

Source: The Manifesto of the Communist Party (1848), Section 2, paragraph 13.

Communication

“You can go home again, the General Temporal Theory asserts, so long as you understand that home is a place where you have never been.”

Ursula K. Le Guin Hainish Cycle

Source: Hainish Cycle, (1974), Chapter 2 (p. 55)

Home , Understanding

“For want of the apparatus of propositional functions, many logicians have been driven to the conclusion that there are unreal objects. It is argued, e. g., by Meinong, that we can speak about "the golden mountain," "the round square," and so on; we can make true propositions of which these are the subjects; hence they must have some kind of logical being, since otherwise the propositions in which they occur would be meaningless. In such theories, it seems to me, there is a failure of that feeling for reality which ought to be preserved even in the most abstract studies. Logic, I should maintain, must no more admit a unicorn than zoology can; for logic is concerned with the real world just as truly as zoology, though with its more abstract and general features.”

Bertrand Russell (1872–1970) logician, one of the first analytic philosophers and political activist

Source: 1910s, Introduction to Mathematical Philosophy (1919), Ch. 16: Descriptions

World , Feeling , Mountain , Failure

“The definition of random in terms of a physical operation is notoriously without effect on the mathematical operations of statistical theory because so far as these mathematical operations are concerned random is purely and simply an undefined term. The formal and abstract mathematical theory has an independent and sometimes lonely existence of its own. But when an undefined mathematical term such as random is given a definite operational meaning in physical terms, it takes on empirical and practical significance. Every mathematical theorem involving this mathematically undefined concept can then be given the following predictive form: If you do so and so, then such and such will happen.”

Walter A. Shewhart (1891–1967) American statistician

[Shewhart, Walter A., Deming, William E., Statistical Method from the Viewpoint of Quality Control, The Graduate School, The Department of Agriculture, 1939, 18]
Economic Control of Quality of Manufactured Product,1931

Mathematics

“Our best theories are not only truer than common sense, they make more sense than common sense…”

David Deutsch book The Fabric of Reality

The Fabric of Reality (1997)

Sense

“I think the art of filmmaking is something you learn through actions, by doing it, not by learning theories. And as you do it, your mind starts to change.”

Alejandro Jodorowsky (1929) Filmmaker and comics writer

Anarchy and Alchemy: the Films of Alejandro Jodorowsky by Ben Cobb (2007) p. 115

Art , Thinking , Learning , Change

“What is studied is a system which lives in the minds of economists but not on earth. I have called the result “blackboard economics.” The firm and the market appear by name but they lack any substance. The firm in mainstream economic theory has often been described as a “black box.””

Ronald H. Coase (1910–2013) British economist and author

And so it is.
1990s and later, "The Institutional Structure of Production" (1992)

Study , Appearance , Box

“About ten months ago a report reached my ears that a certain Fleming had constructed a spyglass by means of which visible objects, though very distant from the eye of the observer, were distinctly seen as if nearby. Of the truly remarkable effect several experiences were related, to which some persons gave credence while others denied them. A few days later a report was confirmed to me in a letter from a noble Frenchman in Paris, Jacques Badovere, which caused me to apply myself wholeheartedly to inquire into means by which I might arrive at the invention of a similar instrument. This I did shortly afterwards, my basis being the theory of refraction. First I prepared a tube of lead, at the ends I fitted two glass lenses, both plane on one side while on the other side one was spherically convex and the other concave. Then placing my eye near the concave lens I perceived objects satisfactorily large and near, for they appeared three times closer and nine times larger than when seen with the naked eye alone. Next I constructed another one, more accurate, which represented objects as enlarged more than sixty times. Finally, sparing neither labor nor expense, I succeeded in constructing for myself so excellent an instrument that objects seen by means of it appeared nearly one thousand times larger and over thirty times closer than when regarded with our natural vision.”

Galileo Galilei book Sidereus Nuncius

Translation by Stillman Drake in Discoveries and Opinions of Galileo (1957)
Sidereus Nuncius (Venice, 1609)

Nature , Distant , Appearance , Time

“I am a sincere Catholic as it were Corneille, Racine, La Bruyère, Bossnet, Bourdaloue, Fènelon, as were and still are so many of the most of the honor of out science, philosophy and literature, and have conferred such brilliant ustre on our Academies. I share the deep conviction openly manifested in words, deeds and writings by so many savants of the first rank, by a Ruffini, a Haüy, a Laënnec, an Ampere, a Pelletier, a Freycinet, a Coriolis and I avoid naming any of those living, for fear of paining their podesty. I may at least be allowed to say that I loved to recognize all the noble generosity of the Christian Faith in my illustrious friends the creator of Crystallography (Haüy), the introducers of quinine and stethoscope (Pelletier and Laënnec), the famous voyager on board of the 'Urania', and the immortal founders of the theory of Dynamic Electricity”

Augustin Louis Cauchy (1789–1857) French mathematician (1789–1857)

Frencinet and Ampère

Love , Pain , Fear , Faith

“Anyone who is not shocked by quantum theory has not understood it.”

Niels Bohr (1885–1962) Danish physicist

Bohr said this sentence in a conversation with Werner Heisenberg, as quoted in: "Der Teil und das Ganze. Gespräche im Umkreis der Atomphysik" . R. Piper & Co., München, 1969, S. 280. DIE ZEIT 22. Aug. 1969 http://www.zeit.de/1969/34/kein-chaos-aus-dem-nicht-wieder-ordnung-wuerde.
As quoted in Meeting the Universe Halfway (2007) by Karen Michelle Barad, p. 254 http://books.google.com/books?id=4qYorOpfB6EC&lpg=PP1&pg=PA254#v=onepage&q&f=false, with the quote attributed to The Philosophical Writings of Niels Bohr, but with no page number or volume number given.
David Mermin, on pages 186– 187 http://books.google.com/books?id=bf5bjBk095UC&lpg=PP1&pg=PA187#v=onepage&q&f=false of his book Boojums All the Way Through: Communicating Science in a Prosaic Age (1990) noted that he specifically looked for pithy quotes about quantum mechanics along these lines when reviewing the three volumes of The Philosophical Writings of Niels Bohr, but couldn't find any: <blockquote>Once I tried to teach some quantum mechanics to a class of law students, philosophers, and art historians. As an advertisement for the course I put together the most sensational quotations I could collect from the most authoritative practitioners of the subject. Heisenberg was a goldmine: “The concept of the objective reality of the elementary particles has thus evaporated…”; “the idea of an objective real world whose smallest parts exist objectively in the same sense as stones or trees exist, independently of whether or not we observe them … is impossible …” Feynman did his part too: “I think I can safely say that nobody understands quantum mechanics.” But I failed to turn up anything comparable in the writings of Bohr. Others attributed spectacular remarks to him, but he seemed to take pains to avoid any hint of the dramatic in his own writings. You don't pack them into your classroom with “The indivisibility of quantum phenomena finds its consequent expression in the circumstance that every definable subdivision would require a change of the experimental arrangement with the appearance of new individual phenomena,” or “the wider frame of complementarity directly expresses our position as regards the account of fundamental properties of matter presupposed in classical physical description but outside its scope.”<p>I was therefore on the lookout for nuggets when I sat down to review these three volumes – a reissue of Bohr's collected essays on the revolutionary epistemological character of the quantum theory and on the implications of that revolution for other scientific and non-scientific areas of endeavor (the originals first appeared in 1934, 1958, and 1963.) But the most radical statement I could find in all three books was this: "...physics is to be regarded not so much as the study of something a priori given, but rather as the development of methods for ordering and surveying human experience." No nuggets for the nonscientist.</blockquote>
Variants: Those who are not shocked when they first come across quantum mechanics cannot possibly have understood it.
Those who are not shocked when they first come across quantum theory cannot possibly have understood it.
Anyone who is not shocked by quantum theory has not understood a single word.
If you think you can talk about quantum theory without feeling dizzy, you haven't understood the first thing about it.

“A simple calculation shows that from the classical theory follows that we should find a broadening of the beam with the maximum intensity on the place of the beam without field. However, from the quantum theory follows that we should find there no intensity at all, and deflected molecules on both sides. The beam should split up in two beams corresponding to the two orientations of the magnet. The experiment decided in favor of the quantum theory.”

Otto Stern (1888–1969) German physicist

the conclusion of the historical Stern-Gerlach experiment, in The Method of Molecular Rays http://nobelprize.org/nobel_prizes/physics/laureates/1943/stern-lecture.html, Nobel Lecture, December 12, 1946.

“Economists can never be free of from difficulties unless they will distinguish between a theory and the application of a theory.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter IV, Theory of Exchange, p. 108.

“The advantages of models are, on one hand, that they force us to present a "complete" theory by which I mean a theory taking into account all relevant phenomena and relations and, on the other hand, the confrontation with observation, that is, reality.”

Jan Tinbergen (1903–1994) Dutch economist

"The Use of Models: Experience," 1969

Reality

“The big Other, the symbolic order, with a traumatic element at its very heart; and in Lacanian theory the fantasy is a construction allowing the subject to come to terms with this traumatic kernel. At this level the final moment of the analysis is defined as going through the fantasy [la traversée du fantasme]: not its symbolic interpretation but the experience of the fact that the fantasy-object, by its fascinating presence, is merely filling out a lack, a void in the Other. There is nothing behind the fantasy; the fantasy is a construction whose function is to hide this void, this nothing”

Slavoj Žižek book The Sublime Object of Ideology

that is, the lack in the Other.
148
The Sublime Object of Ideology (1989)

Heart

“There is a constant succession of books on the subject of comparative grammar, for the use both of students and of the general public; yet it does not seem that we are offered what we really need. Language is full of lessons for those who know how to question it. Through all the centuries humanity has deposited in Language the acquisitions of material and moral life. But it must be approached from the side on which it appeals to the mind. If we limit ourselves to the changes of vowels and consonants, the study is reduced to the proportions of a merely secondary branch of acoustics and physiology; if we think it enough to enumerate the losses undergone *by the machinery of grammar, we give the impression of a building that is falling into ruins; if we confine ourselves to vague theories on the origin of Language, we merely add an unprofitable chapter to the history of systems.”

Michel Bréal (1832–1915) French philologist

Source: Essai de semantique, 1897, p. 1; lead paragraph

Life , Books , History , Question

“The error in positivism is that it takes as its standard of truth the contingently given division of labor, that between the science and social praxis as well as that within science itself, and allows no theory that could reveal the division of labor to be itself derivative and mediated and thus strip it of its false authority.”

Theodor W. Adorno (1903–1969) German sociologist, philosopher and musicologist known for his critical theory of society

Falsch am Positivismus ist, daß er die nun einmal gegebene Arbeitsteilung, die der Wissenschaften von der gesellschaftlichen Praxis und die innerhalb der Wissenschaft, als Maß des Wahren supponiert und keine Theorie erlaubt, welche die Arbeitsteilung selbst als abgeleitet, vermittelt durchsichtig machen, ihrer falschen Autorität entkleiden könnte.
Source: Wozu noch Philosophie? [Why still philosophy?] (1963), p. 10

Truth , Error , Science , Falseness

“A good teacher offers practice, a bad one offers theories.”

Anthony de Mello (1931–1987) Indian writer

Cultivation
One Minute Wisdom (1989)

Teachers

“The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.”

David Deutsch book The Fabric of Reality

The Fabric of Reality (1997)

“When I once called myself a “Sunday painter” dabbling in stochastic finance, that was not meant to belittle finance theory as a branch of serious economic theory. Such a peculiar view was expressed again and again by the late Milton Friedman, a dizzy view that I still find incomprehensible.”

Paul A. Samuelson (1915–2009) American economist

New millennium, An Enjoyable Life Puzzling Over Modern Finance Theory, 2009

“A frequent source of misunderstanding has to do with the interpretation of fuzzy logic. The problem is that the term fuzzy logic has two different meanings. More specifically, in a narrow sense, fuzzy logic, FLn, is a logical system which may be viewed as an extension and generalization of classical multivalued logics. But in a wider sense, fuzzy logic, FLw is almost synonymous with the theory of fuzzy sets. In this context, what is important to recognize is that: (a) FLw is much broader than FLn and subsumes FLn as one of its branches; (b) the agenda of FLn is very different from the agendas of classical multivalued logics; and (c) at this juncture, the term fuzzy logic is usually used in its wide rather than narrow sense, effectively equating fuzzy logic with FLw</sub”

Lotfi A. Zadeh (1921–2017) Electrical engineer and computer scientist

Zadeh (1995) in Foreword of George J. Klir Fuzzy sets and fuzzy logic: theory and applications.
1990s

Problem , Sense

“This is a study of the public administration movement from the viewpoint of political theory and the history of ideas. It seeks to review and analyze the theoretical element in administrative writings and to present the development of the public administration movement as a chapter in the history of American political thought.”

Dwight Waldo (1913–2000) American political scientist

Preview; lead paragraph
The Administrative State, 1948

History , Idea , Study

“Theoretical approaches have their place and are, I suppose, essential but a theory must be tempered with reality.”

Jawaharlal Nehru (1889–1964) Indian lawyer, statesman, and writer, first Prime Minister of India

Jawaharlal Nehru's Speeches 1949 - 1953 (1954), p. 235

Reality

“A logical theory may be tested by its capacity for dealing with puzzles, and it is a wholesome plan, in thinking about logic, to stock the mind with as many puzzles as possible, since these serve much the same purpose as is served by experiments in physical science.”

Bertrand Russell (1872–1970) logician, one of the first analytic philosophers and political activist

"On Denoting", Mind, Vol. 14, No. 56 (October 1905), pp. 479–493; as reprinted in Logic and Knowledge: Essays, 1901–1950, (1956)
1900s

Thinking , Science

“The theory of "defeating" opportunist elements by the ideological struggle within the Party, the theory of "overcoming" these elements within the confines of a single party, is a rotten and dangerous theory, which threatens to condemn the Party to paralysis and chronic infirmity, threatens to leave the Party a prey to opportunism, threatens to leave the proletariat without a revolutionary party, threatens to deprive the proletariat of its main weapon in the fight against imperialism. Our Party could not have emerged on to the broad highway, it could not have seized power and organised the dictatorship of the proletariat, it could not have emerged victorious from the civil war, if it had had within its ranks people like Martov and Dan, Potresov and Axelrod. Our Party succeeded in achieving internal unity and unexampled cohesion of its ranks primarily because it was able to in good time to purge itself of the opportunist pollution, because it was able to rid its ranks of the Liquidators and Mensheviks. Proletarian parties develop and become strong by purging themselves of opportunists and reformists, social-imperialists and social-chauvinists, social-patriots and social-pacifists.”

Joseph Stalin (1879–1953) General secretary of the Communist Party of the Soviet Union

Source: The Foundations of Leninism, Ch.8

War , People , Strong , Time

“I want to emphasize the necessity for a sound mathematical basis for any fundamental physical theory. Any philosophical ideas that one may have play only a subordinate role. Unless such ideas have a mathematical basis they will be ineffective.”

Paul Dirac (1902–1984) theoretical physicist

The Mathematical Foundations of Quantum Theory (1978)

Mathematics , Idea

“But a theory is not like an airline or bus timetable. We are not interested simply in the accuracy of its predictions. A theory also serves as a base for thinking. It helps us to understand what is going on by enabling us to organize our thoughts. Faced with a choice between a theory which predicts well but gives us little insight into how the system works and one which gives us this insight but predicts badly, I would choose the latter, and I am inclined to think that most economists would do the same.”

Ronald H. Coase (1910–2013) British economist and author

1960s-1980s, "How should economists choose?" (1981)

Understanding , Thinking , Help

“The Big Bang theory says nothing about what banged, why it banged, or what happened before it banged.”

Alan Guth (1947) American theoretical physicist and cosmologist

Alan Guth: What made the Big Bang bang http://www.bostonglobe.com/magazine/2014/05/02/alan-guth-what-made-big-bang-bang/RmI4s9yCI56jKF6ddMiF4L/story.html

“The main form of crude communism is based upon emotional antipathy towards private property, and asserts that all men should be reduced to a similar level, so that everyone has an equal share of property. This is not genuine communism, Marx asserts, since it rests upon the same sort of distorted objectification of labor as is found in the theory of political economy. Crude communism of this sort becomes impelled towards a primitive asceticism, in which the community has become the capitalist instead of the individual. In crude communism, the rule of property is still dominant, but negatively: “Universal envy setting itself up as a power is only a camouflaged form of cupidity which re-establishes itself and satisfies itself in a different way.””

Anthony Giddens (1938) British sociologist

Source: Capitalism and Modern Social Theory (1971), p. 16 (Quote is from Marx, Early Writings (1964), p. 154).

Men , Way , Communication , Universe

“Personally, I feel more irritated by a challenge to an accepted scientific theory than I do by an act of so-called "evil" or "injustice" among mankind; although I never allow my irritation to hamper my acceptance of the new theory as soon as positive evidence warrants it. Thus I have reluctantly exchanged the old nebular for the planetesimal hypothesis, and am beginning to accept the main points of relativity despite a profound intellectual distaste. What is, is—and our emotions regarding the cosmos and its phenomena are of no significance whatever, being wholly subjective matters dependent on individual accidents of neural and glandular physiology and of experience and environment.”

H.P. Lovecraft (1890–1937) American author

Letter to Woodburn Harris (25 February-1 March 1929), in Selected Letters II, 1925-1929 edited by August Derleth and Donald Wandrei, pp. 287-288
Non-Fiction, Letters

Feeling , Evil , Dependency , Personality

“Of course, science lives by confusing theories, but what were accepted as 'theories' even by the many professional psychologists and psychiatrists were very poor limitations of what physical scientists call a theory.”

Raymond Cattell (1905–1998) British-American psychologist

Source: The Scientific Analysis of Personality, 1965, p. 16 (1966 edition)

Science

“Science walks forward on two feet, namely theory and experiment.”

Robert Andrews Millikan (1868–1953) American physicist

1923 Nobel Prize lecture Robert A. Millikan - Nobel Lecture: The Electron and the Light-Quant from the Experimental Point of View, Nobelprize.org, PDF, 30 January 2014 http://www.nobelprize.org/nobel_prizes/physics/laureates/1923/millikan-lecture.pdf,

Science

“I believe what really happens in history is this: the old man is always wrong; and the young people are always wrong about what is wrong with him. The practical form it takes is this: that, while the old man may stand by some stupid custom, the young man always attacks it with some theory that turns out to be equally stupid.”

G. K. Chesterton (1874–1936) English mystery novelist and Christian apologist

Illustrated London News (3 June 1922)

People , Stupidity , History

“A long decade ago economic growth was the reigning fashion of political economy. It was simultaneously the hottest subject of economic theory and research, a slogan eagerly claimed by politicians of all stripes, and a serious objective of the policies of governments. The climate of opinion has changed dramatically. Disillusioned critics indict both economic science and economic policy for blind obeisance to aggregate material "progress," and for neglect of its costly side effects. Growth, it is charged, distorts national priorities, worsens the distribution of income, and irreparably damages the environment. Paul Erlich speaks for a multitude when he says, "We must acquire a life style which has as its goal maximum freedom and happiness for the individual, not a maximum Gross National Product."”

James Tobin (1918–2002) American economist

Nordhaus, William D., and James Tobin. " Is growth obsolete? http://www.nber.org/chapters/c7620.pdf." Economic Research: Retrospect and Prospect Vol 5: Economic Growth. Nber, 1972. 1-80.
1970s and later

Life , Fashion , Freedom , Science

“Life is not theory. It is reality, with inherent duties to everything and everyone.”

Tivadar Csontváry Kosztka (1853–1919) painter from Hungary

The Authority

Life , Reality

“There are many examples of old, incorrect theories that stubbornly persisted, sustained only by the prestige of foolish but well-connected scientists. … Many of these theories have been killed off only when some decisive experiment exposed their incorrectness... Thus the yeoman work in any science, and especially physics, is done by the experimentalist, who must keep the theoreticians honest.”

Michio Kaku book Hyperspace

Hyperspace (1995)

Decision , Science

“[Evolution] has in recent years been challenged in the world of science and is not yet believed in the scientific community to be as infallible as it once was believed. But if it was going to be taught in the schools, then I think that also the biblical theory of creation, which is not a theory but the biblical story of creation, should also be taught.”

Ronald Reagan (1911–2004) American politician, 40th president of the United States (in office from 1981 to 1989)

Press conference at evangelical event in Dallas, Texas. (22 August 1980)
1980s

World , School , Communication , Thinking

“The aim of science is to falsify theories and to replace them by better theories, theories that demonstrate a greater ability to withstand tests.”

Alan Chalmers book What Is This Thing Called Science?

Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 6, Sophisticated falsification, novel predictions and the growth of science, p. 83

Science

“Any progress in the theory of partial differential equations must also bring about a progress in Mechanics.”

Carl Gustav Jacob Jacobi (1804–1851) German mathematician

Vorlesungen über Dynamik http://archive.org/details/cgjjacobisvorle00lottgoog [Lectures on Dynamics] (1842/3; publ. 1884).

“Marxism is not only the theory of socialism, it is an integral world outlook, a philosophical system, from which Marx’s proletarian socialism logically follows. This philosophical system is called dialectical materialism.”

Joseph Stalin (1879–1953) General secretary of the Communist Party of the Soviet Union

Anarchism or Socialism (1906)

World

“In mainstream economic theory, the firm and the market are, for the most part, assumed to exist and are not themselves the subject of investigation. One result has been that the crucial role of the law in determining the activities carried out by the firm and in the market has been largely ignored.”

Ronald H. Coase (1910–2013) British economist and author

1960s-1980s, "The Firm, the Market, and the Law" (1988)

Law , Parting

“Philosophy … should not imagine that specialized work in epistemological theory, or whatever else prides itself on being research, is actually philosophy. Yet a philosophy forswearing all of that must in the end be irreconcilably at odds with the dominant consciousness. Nothing else raises it above the suspicion of apologetics. Philosophy that satisfies its own intention, and does not childishly skip behind its own history and the real one, has its lifeblood in the resistance against the common practices of today and what they serve, against the justification of what happens to be the case.”

Theodor W. Adorno (1903–1969) German sociologist, philosopher and musicologist known for his critical theory of society

Source: Wozu noch Philosophie? [Why still philosophy?] (1963), p. 6

Imagination , History

“The Court's justification for consulting its own notions rather than following the original meaning of the Constitution, as I would, apparently is based on the belief of the majority of the Court that for this Court to be bound by the original meaning of the Constitution is an intolerable and debilitating evil; that our Constitution should not be 'shackled to the political theory of a particular era,' and that to save the country from the original Constitution the Court must have constant power to renew it and keep it abreast of this Court's more enlightened theories of what is best for our society. It seems to me that this is an attack not only on the great value of our Constitution itself but also on the concept of a written constitution which is to survive through the years as originally written unless changed through the amendment process which the Framers wisely provided.”

Hugo Black (1886–1971) U.S. Supreme Court justice

Dissenting in Harper v. Virginia Board of Elections, 383 U.S. 663 (1966).

Evil , Change , Country

“Laws which are consistent in theory often prove chaotic in practice.”

Napoleon I of France (1769–1821) French general, First Consul and later Emperor of the French

Napoleon : In His Own Words (1916)

Law

“I suspect that many of the world's financial lords are somewhat embarrassed to tell Japan repeatedly at G-7 meetings and elsewhere to adopt a Keynesian solution. Within Europe, central banks and governments think Keynesian theories and policies are absolutely wrong. Despite the remarkable success of pragmatic policies in the United States, true believers in the Invisible Hand reject Keynesian diagnoses and prescriptions. Many observers of Japan have found it intellectually comforting to blame the slump on the plight of the banks, flooded with bad loans dated from the land and equity bubbles and their collapse. They hope that a governmentmanaged and -subsidized rectification of bank balance sheets will trigger overall economic recovery. I think this is a false hope. The bank problem is only a small part of the macroeconomic disaster. It has to be resolved, of course, but resolution that is no substitute for the needed fiscal and monetary stimuli.”

James Tobin (1918–2002) American economist

"Reflections on Japanese Political Economy" (1999)

World , Hope , Problem , Thinking

“[Unlike the] utilitarian… I judge pleasure and pain to be of small importance compared to knowledge, the appreciation and contemplation of beauty, and a certain intrinsic excellence of mind which, apart from its practical effects, appears to me to deserve the name of virtue. [For] many years it seemed to me perfectly self-evident that pleasure is the only good and pain the only evil. Now, however, the opposite seems to me self-evident.
What first turned me away from utilitarianism was the persuasion that I myself ought to pursue philosophy, although I had (and have still) no doubt that by doing economics and the theory of politics I could add more to human happiness. It appeared to me that the dignity of which human existence is capable is not attainable by devotion to the mechanism of life, and that unless the contemplation of eternal things is preserved, mankind will become no better than well-fed pigs. But I do not believe that such contemplation on the whole tends to happiness. It gives moments of delight, but these are outweighed by years of effort and depression.”

Bertrand Russell (1872–1970) logician, one of the first analytic philosophers and political activist

Letter to Gilbert Murray, April 3, 1902
1900s

Life , Pain , Pleasure , Beauty

“The dualistic philosophy reigned supreme in Europe, dominating the development of Western science. But with the advent of atomic physics, findings based on demonstrable experiment were seen to negate the dualistic theory, and the trend of thought since then has been back to the monistic conception of the ancient Taoists.”

Bruce Lee (1940–1973) Hong Kong-American actor, martial artist, philosopher and filmmaker

Source: Striking Thoughts (2000), p.. 21

Science

“At the beginning of time the laws of Nature were probably very different from what they are now. Thus we should consider the laws of Nature as continually changing with the epoch, instead of as holding uniformly throughout space-time. This idea was first put forward by Milne, who worked it out on… assumptions… not very satisfying… we should expect them also to depend on position in space, in order to preserve the beautiful idea of the theory of relativity [that] there is fundamental similarity between space and time.”

Paul Dirac (1902–1984) theoretical physicist

The Relation between Mathematics and Physics http://www.damtp.cam.ac.uk/events/strings02/dirac/speach.html (Feb. 6, 1939) Proceedings of the Royal Society (Edinburgh) Vol. 59, 1938-39, Part II, pp. 122-129.

Law , Beauty , Idea , Nature

“Leninism is Marxism of the era of imperialism and the proletarian revolution. To be more exact, Leninism is the theory and tactics of the proletarian revolution in general, the theory and tactics of the dictatorship of the proletariat in particular. Marx and Engels pursued their activities in the pre-revolutionary period (we have the proletarian revolution in mind), when developed imperialism did not yet exist, in the period of the proletarians' preparation for revolution, in the period when the proletarian revolution was not yet an immediate practical inevitability. But Lenin, the disciple of Marx and Engels, pursued his activities in the period of developed imperialism, in the period of the unfolding proletarian revolution, when the proletarian revolution had already triumphed in one country, had smashed bourgeois democracy and had ushered in the era of proletarian democracy, the era of the Soviets.”

Joseph Stalin (1879–1953) General secretary of the Communist Party of the Soviet Union

The Foundations of Leninism

Democracy , Country

“All I say is that I think it is damned unlikely that anything like a central cosmic will, a spirit world, or an eternal survival of personality exist. They are the most preposterous and unjustified of all the guesses which can be made about the universe, and I am not enough of a hair-splitter to pretend that I don't regard them as arrant and negligible moonshine. In theory I am an agnostic, but pending the appearance of radical evidence I must be classed, practically and provisionally, as an atheist.”

H.P. Lovecraft (1890–1937) American author

Letter to Robert E. Howard (16 August 1932), in Selected Letters 1932-1934 edited by August Derleth and Donald Wandrei, p. 57
Non-Fiction, Letters

World , Thinking , Universe , Appearance

“Out of the unconscious you get ritual, dreams, drama, story, art, music, and that sort of buffers us. We have our little domain of competence, and we're buffered by the domain of fantasy and culture. That's really what you learn about when you come to university if you're lucky and the professors are smart enough to actually teach you something about culture instead of constantly telling you that it's completely reprehensible and that it should be destroyed. Why you would prefer chaos to order is beyond me. The only possible reason is that you haven't read enough history to understand exactly what chaos means. And believe me, if you knew what chaos means, you'd be pretty goddamn careful about tearing down the temple that you live in, unless you want to be a denizen of chaos. And some people do. That's when the impulses you harbor can really come out and shine. And so a little gratitude is in order, and that makes you appreciative of the wise king while being smart enough to know that he's also an evil tyrant. That's a total conception of the world. It's balanced. Yah, we should preserve nature, but it IS trying to kill us. YES our culture is tyrannical and oppresses people, but it IS protecting us from dying. And YES we're reasonably good people, but don't take that theory too far until you've tested yourself. That's wisdom, at least in part, and that's what these stories try to teach you.”

Jordan Peterson (1962) Canadian clinical psychologist, cultural critic, and professor of psychology

Other

Wisdom , People , World , Dreams

“Psychology appeared to be a jungle of confusing, conflicting, and arbitrary concepts. These pre-scientific theories doubtless contained insights which still surpass in refinement those depended upon by psychiatrists or psychologists today. But who knows, among the many brilliant ideas offered, which are the true ones? Some will claim that the statements of one theorist are correct, but others will favour the views of another. Then there is no objective way of sorting out the truth except through scientific research.”

Raymond Cattell (1905–1998) British-American psychologist

Source: The Scientific Analysis of Personality, 1965, p. 14 (quote doesn't seem to be present in 1966 edition)

Truth , Way , Idea , Appearance

“The concept of rotation led to geometrical exponential magnitudes, to the analysis of angles and of trigonometric functions, etc. I was delighted how thorough the analysis thus formed and extended, not only the often very complex and unsymmetric formulae which are fundamental in tidal theory, but also the technique of development parallels the concept.”

Hermann Grassmann (1809–1877) German polymath, linguist and mathematician

Ausdehnungslehre (1844)

“The Western approach to reality is mostly through theory, and theory begins by denying reality — to talk about reality, to go around reality, to catch anything that attracts our sense-intellect and abstract it away from reality itself. Thus philosophy begins by saying that the outside world is not a basic fact, that its existence can be doubted and that every proposition in which the reality of the outside world is affirmed is not an evident proposition but one that needs to be divided, dissected and analyzed. It is to stand consciously aside and try to square a circle.”

Bruce Lee (1940–1973) Hong Kong-American actor, martial artist, philosopher and filmmaker

Source: Striking Thoughts (2000), p. 15 - 16

World , Reality , Sense

“The Steady State theory was what Karl Popper would call a good scientific theory: it made definite predictions, which could be tested by observation, and possibly falsified. Unfortunately for the theory, they were falsified.”

Stephen Hawking (1942–2018) British theoretical physicist, cosmologist, and author

The Beginning of Time (1996)

“No one has yet discovered any warlike purpose to be served by the theory of numbers or relativity, and it seems unlikely that anyone will do so for many years.”

G. H. Hardy book A Mathematician's Apology

A Mathematician's Apology (1941)

“Classical mechanics has been developed continuously from the time of Newton and applied to an ever-widening range of dynamical systems, including the electromagnetic field in interaction with matter. The underlying ideas and the laws governing their application form a simple and elegant scheme, which one would be inclined to think could not be seriously modified without having all its attractive features spout. Nevertheless it has been found possible to set up a new scheme, called quantum mechanics, which is more suitable for the description of phenomena on the atomic scale and which is in some respects more elegant and satisfying than the classical scheme. This possibility is due to the changes which the new scheme involves being of a very profound character and not clashing with the features of the classical theory that make it so attractive, as a result of which all these features can be incorporated in the new scheme.”

Paul Dirac book Principles of Quantum Mechanics

I. The Principle of Superposition - 1. The Need for a Quantum Theory
The Principles of Quantum Mechanics (4th ed. 1958)

Law , Idea , Thinking , Change

“Strange as these words may sound I often play with the idea that when all the social theories collapse and wars and revolutions leave humanity in utter gloom, the poet — whom Plato banned from his Republic — may rise up to save us all.”

Isaac Bashevis Singer (1902–1991) Polish-born Jewish-American author

Nobel lecture (1978)

War , Idea

“Combine general relativity and quantum theory into a single theory that can claim to be the complete theory of nature. This is called the problem of quantum gravity.”

Lee Smolin (1955) American cosmologist

The Trouble With Physics: The Rise of String Theory, The Fall of a Science, and What Comes Next (2007)

Nature , Problem

“Years from now, people will find our acceptance of the HIV theory of AIDS as silly as we find those who excommunicated Galileo.”

Kary Mullis (1944–2019) American biochemist

Dancing Naked in the Mind Field, 1998.

People

“In Foundations of the Theory of Signs (p. 6), the three terms in question were defined follows: pragmatics as the study of "the relation of signs to interpreters", semantics as the study of "the relations of signs to the objects to which the signs are applicable", syntactics as the study of "the formal relations of signs to one another."”

Charles W. Morris (1903–1979) American philosopher

Source: Writings on the General Theory of Signs, 1971, p. 301

Question , Study

“In war, theory is all right so far as general principles are concerned; but in reducing general principles to practice there will always be danger. Theory and practice are the axis about which the sphere of accomplishment revolves.”

Napoleon I of France (1769–1821) French general, First Consul and later Emperor of the French

Napoleon : In His Own Words (1916)

War

“I had, to be sure, been drawn into economics when the General Theory was an exciting revelation for students hungry for explanation and remedy of the Great Depression. At the same time, I was uncomfortable with several aspects of Keynes’ theory, and I sought to improve what would now be called the microfoundations of his macroeconomic relations.”

James Tobin (1918–2002) American economist

"Price Flexibility and Output Stability: An Old Keynesian View" (1993)

Time

“What is missing from the policy analyst's tool kit - and from the set of accepted, well-developed theories of human organization - is an adequately specified theory of collective action whereby a group of principals can organize themselves voluntarily to retain the residuals of their own efforts.”

Elinor Ostrom (1933–2012) American political economist

Elinor Ostrom (1996) Governing the Commons: The Evolution of Institutions for Collective Action p. 25-26

Effort

“No one can escape the power of language, let alone those of English birth brought up from childhood, as Mrs. Hilbery had been, to disport themselves now in the Saxon plainness, now in the Latin splendor of the tongue, and stored with memories, as she was, of old poets exuberating in an infinity of vocables. Even Katharine was slightly affected against her better judgment by her mother's enthusiasm. Not that her judgment could altogether acquiesce in the necessity for a study of Shakespeare's sonnets as a preliminary to the fifth chapter of her grandfather's biography. Beginning with a perfectly frivolous jest, Mrs. Hilbery had evolved a theory that Anne Hathaway had a way, among other things, of writing Shakespeare's sonnets; the idea, struck out to enliven a party of professors, who forwarded a number of privately printed manuals within the next few days for her instruction, had submerged her in a flood of Elizabethan literature; she had come half to believe in her joke, which was, she said, at least as good as other people's facts, and all her fancy for the time being centered upon Stratford-on-Avon.”

Virginia Woolf book Night and Day

Source: Night and Day (1919), Ch. 24

People , Way , Literature , Idea

“It seems that scientists are often attracted to beautiful theories in the way that insects are attracted to flowers — not by logical deduction, but by something like a sense of smell.”

Steven Weinberg (1933) American theoretical physicist

Physics Today (November 2005) page 35

Beauty , Way , Flowers , Sense

“It would be consistent and proper for us to join the war for democratic freedom, only if we would likewise be assured that democratic freedom in theory as well as in practice.”

Aung San (1915–1947) Burmese revolutionary leader

Address delivered at the meeting of East and West Association held on August 29, 1945, at the City Hall of Rangoon

War , Freedom

“These lectures have shown very clearly the difference between Roger and me. He's a Platonist and I'm a positivist. He's worried that Schrödinger's cat is in a quantum state, where it is half alive and half dead. He feels that can't correspond to reality. But that doesn't bother me. I don't demand that a theory correspond to reality because I don't know what it is. Reality is not a quality you can test with litmus paper. All I'm concerned with is that the theory should predict the results of measurements. Quantum theory does this very successfully. It predicts that the result of an observation is either that the cat is alive or that it is dead. It is like you can't be slightly pregnant: you either are or you aren't.”

Stephen Hawking book The Nature of Space and Time

During a debate with Roger Penrose in 1994 at the Isaac Newton Institute for Mathematical Sciences at the University of Cambridge, transcribed in The Nature of Space and Time (1996) by Stephen Hawking and Roger Penrose, p. 121 http://books.google.com/books?id=LstaQTXP65cC&lpg=PP1&dq=nature%20of%20space%20and%20time&pg=PA121#v=onepage&q=&f=false

Feeling , Cats , Reality , Dead

“A consensus has emerged in our scientific community that global warming is no longer merely a theory but a reality, a crisis with truly global implications for planet Earth and all of us who share it. - Told to thousands at the New Jersey concert for Live Earth”

Leonardo DiCaprio (1974) American actor and film producer

Communication , Reality

“In our society today, when we teach the righteous way of life based upon the Theory of judo which embodies the principles of continuous improvement of society, then this righteous life provides a basis of definite proof of this principle and unifies the peoples' way of thinking. Various religious and learned points of view are then made abundantly clear.”

Kanō Jigorō (1860–1938) Japanese educator and judoka

Kodokan Magazine (1974)

Life , People , Way , Thinking

Quotes about theory page 2

Quotes about theory
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