“Most people who haven't been trained in physics probably think of what physicists do as a question of incredibly complicated calculations, but that's not really the essence of it. The essence of it is that physics is about concepts, wanting to understand the concepts, the principles by which the world works.”

— Edward Witten

"Edward Witten" interview, Superstrings: A Theory of Everything? (1992) ed. P.C.W. Davies, Julian Brown

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American theoretical physicist 1951

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“... like most physicists, I really enjoy talking about physics.”

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[A Conversation with Nima Arkani-Hamed: The Power of Principles, Physics Revealed (Part I), April 2, 2021, Ideas Roadshow, YouTube, https://www.youtube.com/watch?v=h6_iJRY6nU4] (quote at 2:47 of 57:39)

“There is no concept in the whole field of physics which is more difficult to understand than is the concept of entropy, nor is there one which is more fundamental.”

Francis Sears (1898–1975) American physicist

[Francis Weston Sears, Mechanics, heat and sound, Addison-Wesley principles of physics series Volume 1, 2nd Edition, Addison-Wesley Press, 1950, 447]

“Feynman was not a theorist's theorist, but a physicist's physicist and a teacher's teacher. Feynman's theoretical concepts opened up research opportunities for experimenters, and his approach to physics dignified the role played by their work.”

Valentine Telegdi (1922–2006) American physicist

[Physics Today, A Lowbrow's View of Feynman, 42, 2, 1989, 10.1063/1.881197] (p. 85)

“The fundamental concept in social science is Power, in the same sense in which Energy is the fundamental concept in physics.”

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

Source: 1930s, Power: A New Social Analysis (1938), Ch. 1: The Impulse to Power

“When the physicist poses the question, "What does it mean to do physics?" or "What is research in physics?" — his question is a preliminary question. Clearly, when you ask a question like that, and try to answer it, you are not "doing physics." Or rather you are no longer doing physics. But when you ask yourself, "What does it mean to do philosophy?" then you actually are "doing philosophy" — this is not at all a "preliminary" question but a truly philosophical one: you are right at the heart of the business.”

Josef Pieper (1904–1997) German philosopher

Source: Leisure, the Basis of Culture (1948), The Philosophical Act, p. 63

“Something is beautiful if it is honest. If you do an engaged piece of work, which is sincere, the concept of beauty meets the concept of truth. So no illusive harmony. I try to reach people who strive for truth, for identity. Although these conceptions are incredibly warn out, one must try to find the way back to these simple conceptions.”

Jörg Immendorff (1945–2007) German artist

Heidrun Reshöft & Joachim Pente (Transl.) " Art : Interview; Jörg Immendorff http://bombmagazine.org/article/322/j-rg-immendorff" at BOMB Magazine, (7) Fall 1983.

“There is really nothing more pathetic than to have an economist or a retired engineer try to force analogies between the concepts of physics and the concepts of economics.”

Paul A. Samuelson (1915–2009) American economist

Source: 1950s–1970s, Maximum Principles in Analytical Economics, 1970, p. 69
Context: There is really nothing more pathetic than to have an economist or a retired engineer try to force analogies between the concepts of physics and the concepts of economics. How many dreary papers have I had to referee in which the author is looking for something that corresponds to entropy or to one or another form of energy. Nonsensical laws, such as the law of conservation of purchasing power, represent spurious social science imitations of the important physical law of the conservation of energy; and when an economist makes reference to a Heisenberg Principle of indeterminacy in the social world, at best this must be regarded as a figure of speech or a play on words, rather than a valid application of the relations of quantum mechanics.

“Jobs: Most people have no concept of how an automatic transmission works, yet they know how to drive a car. You don't have to study physics to understand the laws of motion to drive a car. You don't have to understand any of this stuff to use Macintosh.”

Steve Jobs (1955–2011) American entrepreneur and co-founder of Apple Inc.

Steve Jobs, Playboy, Feb 1985, by Philip Elmer-Dewitt, “Steve-Jobs The Playboy Interview” http://fortune.com/2010/11/20/steve-jobs-the-playboy-interview/, Fortune.com, November 20, 2010.
1980s

“This is the reason why all attempts to obtain a deeper knowledge of the foundations of physics seem doomed to me unless the basic concepts are in accordance with general relativity from the beginning. This situation makes it difficult to use our empirical knowledge, however comprehensive, in looking for the fundamental concepts and relations of physics, and it forces us to apply free speculation to a much greater extent than is presently assumed by most physicists.”

Albert Einstein (1879–1955) German-born physicist and founder of the theory of relativity

1950s, On the Generalized Theory of Gravitation (1950)

“Some Muslim scholars argue that the concept of Democracy is not compatible with the concept of an Islamic state. But of course it is and the Quran outlines the essence of Democracy.”

Muhammad Asad (1900–1992) Austro-Hungarian writer and academic

Documentary, A Road To Mecca.

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