Richard Feynman citations

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If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generations of creatures, what statement would contain the most information in the fewest words? I believe it is the atomic hypothesis (or the atomic fact, or whatever you wish to call it) that all things are made of atoms little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. In that one sentence, you will see, there is an enormous amount of information about the world, if just a little imagination and thinking are applied.
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[...] we have always had (secret, secret, close the doors!) we have always have had a great deal of difficulty in understanding the world view that quantum mechanics represents. At least I do, because I'm an old enough man that I haven't got to the point that this stuff is obvious to me. Okay, I still get nervous with it. And therefore, some of the youngest students...you know how it always is, every new idea, it takes a generation or two until it becomes obvious that there's no real problem. It has not yet become obvious to me that there is no real problem. I cannot define the real problem, therefore I suspect there's no real problem, but I'm not sure there's no real problem.
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sur le fait qu'il existe de nombreuses manières de formuler une même théorie, Discours de réception du prix Nobel.
Citation rapportée

address " What is Science? http://www.fotuva.org/feynman/what_is_science.html", presented at the fifteenth annual meeting of the National Science Teachers Association, in New York City (1966), published in The Physics Teacher, volume 7, issue 6 (1969), p. 313-320

"The Development of the Space-Time View of Quantum Electrodynamics," Nobel Lecture http://nobelprize.org/physics/laureates/1965/feynman-lecture.html (11 December 1965)

letter to Robert Bacher (6 April 1950), quoted in Genius: The Life and Science of Richard Feynman (1992) by James Gleick, p. 278

Source: The Character of Physical Law (1965), chapter 2, “The Relation of Mathematics to Physics”

volume I; lecture 35, "Color Vision"; 35-1 "The human eye"; p. 35-1
The Feynman Lectures on Physics (1964)

Concerning the apparent absurdities of quantum behavior.
chapter 6, “Probability and Uncertainty — the Quantum Mechanical View of Nature,” p. 129
The Character of Physical Law (1965)

Source: The Character of Physical Law (1965), chapter 1, “The Law of Gravitation,” p. 27: video http://www.youtube.com/watch?v=j3mhkYbznBk&t=37m16s

statement (c. 1965), quoted in " An irreverent best-seller by Nobel laureate Richard Feynman gives nerds a good name http://www.people.com/people/article/0,,20091337,00.html", People Magazine (22 July 1985)

What do you mean by you?"
volume I; lecture 8, "Motion"; section 8-1, "Description of motion"; p. 8-2
The Feynman Lectures on Physics (1964)

lecture III: "This Unscientific Age"
David Goodstein reports http://www.americanscientist.org/bookshelf/pub/feynmaniacs-should-read-this-review-skip-lecture-collection-save-22-simoleons that the entire psychology department walked out in a huff at this point.
The Meaning of It All (1999)

Source: QED: The Strange Theory of Light and Matter (1985), p. 3

last words (15 February 1988), according to James Gleick, in Genius: The Life and Science of Richard Feynman (1992), p. 438

Source: QED: The Strange Theory of Light and Matter (1985), p. 13

Source: The Character of Physical Law (1965), chapter 3, “The Great Conservation Principles,” p. 75

lecture III: "This Unscientific Age"
The Meaning of It All (1999)

Rogers Commission Report (1986)

volume II; lecture 20, "Solution of Maxwell's Equations in Free Space"; section 20-3, "Scientific imagination"; p. 20-9 to 20-10
The Feynman Lectures on Physics (1964)

Source: The Character of Physical Law (1965), chapter 1, “The Law of Gravitation,” p. 15: video http://www.youtube.com/watch?v=j3mhkYbznBk&t=12m45s

On his emotional reaction after the first uses of the atomic bomb.
Part 3: "Feynman, The Bomb, and the Military", "Los Alamos from Below", p. 136
Surely You're Joking, Mr. Feynman! (1985)

Part 3: "Feynman, The Bomb, and the Military", "Los Alamos from Below", p. 132
Surely You're Joking, Mr. Feynman! (1985)

volume I; lecture 1, "Atoms in Motion"; section 1-1, "Introduction"; p. 1-1
The Feynman Lectures on Physics (1964)

volume II; lecture 41, "The Flow of Wet Water"; section 41-6, "Couette flow"; p. 41-12
The Feynman Lectures on Physics (1964)

Part 5: "The World of One Physicist", "Is Electricity Fire?", p. 283
Surely You're Joking, Mr. Feynman! (1985)

quoted in Lawrence M. Krauss, Fear of Physics: A Guide for the Perplexed (1993), p. 27

Part 4: "From Cornell to Caltech, With A Touch of Brazil", "Certainly, Mr. Big!", p. 231
Surely You're Joking, Mr. Feynman! (1985)

volume I; lecture 2, "Basic Physics"; section 2-1, "Introduction"; p. 2-1
The Feynman Lectures on Physics (1964)

Source: No Ordinary Genius (1994), p. 252, last words to his artist friend Jirayr Zorthian, as recalled by Zorthian in "No Ordinary Genius" (1993): video http://www.youtube.com/watch?v=Fzg1CU8t9nw&t=1h33m22s

from the First Annual Santa Barbara Lectures on Science and Society, University of California at Santa Barbara (1975)

Rogers Commission Report (1986)