Quotes about certainty
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David Foster Wallace photo
Immanuel Kant photo

“If it were right to overstep a little the limits of apodictic certainty befitting metaphysics, it would seem worth while to trace out some things pertaining not merely to the laws but even to the causes of sensuous intuition, which are only intellectually knowable. Of course the human mind is not affected by external things, and the world does not lie open to its insight infinitely, except as far as itself together with all other things is sustained by the same infinite power of one. Hence it does not perceive external things but by the presence of the same common sustaining cause; and hence space, which is the universal and necessary condition of the joint presence of everything known sensuously, may be called the phenomenal omnipresence, for the cause of the universe is not present to all things and everything, as being in their places, but their places, that is the relations of the substances, are possible, because it is intimately present to all. Furthermore, since the possibility of the changes and successions of all things whose principle as far as sensuously known resides in the concept of time, supposes the continuous existence of the subject whose opposite states succeed; that whose states are in flux, lasting not, however, unless sustained by another; the concept of time as one infinite and immutable in which all things are and last, is the phenomenal eternity of the general cause} But it seems more cautious to hug the shore of the cognitions granted to us by the mediocrity of our intellect than to be carried out upon the high seas of such mystic investigations, like Malebranche, whose opinion that we see all things in God is pretty nearly what has here been expounded.”

Immanuel Kant (1724–1804) German philosopher

Kant's Inaugural Dissertation (1770), Section IV On The Principle Of The Form Of The Intelligible World

Robert A. Heinlein photo
Larry Niven photo

“The trouble with sharing too many beds was that one’s chance of running into a really bad situation was improved almost to certainty.”

Larry Niven (1938) American writer

A Kind of Murder (p. 66)
Short fiction, A Hole in Space (1974)

Richard Feynman photo

“We absolutely must leave room for doubt or there is no progress and no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty. People are terrified — how can you live and not know?”

It is not odd at all. You only think you know, as a matter of fact. And most of your actions are based on incomplete knowledge and you really don't know what it is all about, or what the purpose of the world is, or know a great deal of other things. It is possible to live and not know.
from lecture "What is and What Should be the Role of Scientific Culture in Modern Society", given at the Galileo Symposium in Italy (1964)
The Pleasure of Finding Things Out (1999)

John Stuart Mill photo
Ethan Allen photo
Robert Greene photo
Tzvetan Todorov photo

“A maxim for the twenty-first century might well be to start not by fighting evil in the name of good, but by attacking the certainties of people who claim always to know where good and evil are to be found. We should struggle not against the devil himself but what allows the devil to live — Manichaean thinking itself.”

Tzvetan Todorov (1939–2017) Bulgarian historian, philosopher, structuralist literary critic, sociologist and essayist

paraphrased variant:
We should not be simply fighting evil in the name of good, but struggling against the certainties of people who claim always to know where good and evil are to be found.
Source: Hope and Memory: Reflections on the Twentieth Century (2003), Ch. 5 : The Past in the Present, p. 195

Emmanuel Levinas photo
John Allen Paulos photo
Marilyn Ferguson photo
Koenraad Elst photo
Ibn Hazm photo
J.B. Priestley photo
Edmund Burke photo
John F. Kennedy photo
Richard Feynman photo

“I can live with doubt, and uncertainty, and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong. I have approximate answers, and possible beliefs, and different degrees of certainty about different things, but I'm not absolutely sure of anything. There are many things I don't know anything about, such as whether it means anything to ask "Why are we here?"”

I might think about it a little bit, and if I can't figure it out then I go on to something else. But I don't have to know an answer. I don't feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose — which is the way it really is, as far as I can tell. Possibly. It doesn't frighten me.
Source: No Ordinary Genius (1994), p. 239, from interview in "The Pleasure of Finding Things Out" (1981): video http://www.youtube.com/watch?v=NEwUwWh5Xs4&t=48m10s

Sufyan al-Thawri photo
Leo Tolstoy photo
Justin Barrett photo
Leigh Brackett photo
Douglas Murray photo
William Ewart Gladstone photo

“I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops. […] We know nothing about them because of the survivorlship bias.””

"Wide hats and narrow minds" https://books.google.com/books?id=-lWtVSZoqWkC&pg=PA776 New Scientist 8 March 1979, p. 777. Reprinted in The Panda's Thumb, p. 151 https://books.google.com/books?id=z0XY7Rg_lOwC&pg=PA151.

“We will not lose hope because we have the certainty that our destiny is not in the hands of a man or a superpower. Our destiny is in the hands of God, a Provident Father. It is in Him, and only in Him, that our salvation lies.”

Georges Abou Khazen (1947) Syrian bishop

Syria: Mgr. Khazen (Aleppo), “they are dividing the garments of our country” https://www.agensir.it/quotidiano/2018/2/12/syria-mgr-khazen-aleppo-they-are-dividing-the-garments-of-our-country/ (12 February 2018)

Lev Shestov photo

“We burn with longing to find some firm stance, some ultimate, unshakable basis, on which we may build the tower that can reach up to infinity. But all our foundations crack and earth opens to the abyss. THEREFORE LET US NOT SEEK CERTAINTY OR SECURITY.”

Lev Shestov (1866–1938) Russian theologian

Source: In Job's Balances: on the sources of the eternal truths, Gethsemane Night - Pascal's Philosophy p. 284-285

Abu Talib al-Makki photo
George Bernard Shaw photo
Michel Henry photo

“It is illicit for the heart to smell the scent of certainty while contentment with other-than-God dwells therein.”

Sahl al-Tustari (818–896) arabian Sufi, Islamic theologian

Source: The Sayings and Teachings of the Great Mystics of Islam (2004), p. 54

This quote waiting for review.
José Baroja photo