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" Today we say that the law of relativity is supposed to be true at all energies, but someday somebody may come along and say how stupid we were. "

Richard P. Feynman

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" You're unlikely to discover something new without a lot of practice on old stuff, but further, you should get a heck of a lot of fun out of working out funny relations and interesting things. "

Richard P. Feynman

" If I could explain it to the average person, it wouldn't have been worth the Nobel Prize. "

Richard P. Feynman

" What goes on inside a star is better understood than one might guess from the difficulty of having to look at a little dot of light through a telescope, because we can calculate what the atoms in the stars should do in most circumstances. "

Richard P. Feynman

" People are always asking for the latest developments in the unification of this theory with that theory, and they don't give us a chance to tell them anything about one of the theories that we know pretty well. They always want to know things that we don't know. "

Richard P. Feynman

" Once you have a computer that can do a few things - strictly speaking, one that has a certain 'sufficient set' of basic procedures - it can do basically anything any other computer can do. This, loosely, is the basis of the great principle of 'Universality'. "

Richard P. Feynman

" All the evidence, experimental and even a little theoretical, seems to indicate that it is the energy content which is involved in gravitation, and therefore, since matter and antimatter both represent positive energies, gravitation makes no distinction. "

Richard P. Feynman

" Gravitation is, so far, not understandable in terms of other phenomena. "

Richard P. Feynman

" Each piece, or part, of the whole of nature is always merely an approximation to the complete truth, or the complete truth so far as we know it. In fact, everything we know is only some kind of approximation because we know that we do not know all the laws as yet. "

Richard P. Feynman

" I got a signed document from Bullock's saying that they had such-and-such drawings on consignment. Of course, nobody bought any of them, but otherwise, I was a big success: I had my drawings on sale at Bullock's! "

Richard P. Feynman

" The ideas associated with the problems of the development of science, as far as I can see by looking around me, are not of the kind that everyone appreciates. "

Richard P. Feynman

" It is in the admission of ignorance and the admission of uncertainty that there is a hope for the continuous motion of human beings in some direction that doesn't get confined, permanently blocked, as it has so many times before in various periods in the history of man. "

Richard P. Feynman

" See that the imagination of nature is far, far greater than the imagination of man. "

Richard P. Feynman

" The internal machinery of life, the chemistry of the parts, is something beautiful. And it turns out that all life is interconnected with all other life. "

Richard P. Feynman

" The correct statement of the laws of physics involves some very unfamiliar ideas which require advanced mathematics for their description. Therefore, one needs a considerable amount of preparatory training even to learn what the words mean. "

Richard P. Feynman

" Reality must take precedence over public relations, for nature cannot be fooled. "

Richard P. Feynman

" Once I get on a puzzle, I can't get off. "

Richard P. Feynman

" There is always another way to say the same thing that doesn't look at all like the way you said it before. I don't know what the reason for this is. I think it is somehow a representation of the simplicity of nature. "

Richard P. Feynman

" We do not know what the rules of the game are; all we are allowed to do is to watch the playing. Of course, if we watch long enough, we may eventually catch on to a few of the rules. The rules of the game are what we mean by fundamental physics. "

Richard P. Feynman

" When I was a young man, Dirac was my hero. He made a breakthrough, a new method of doing physics. He had the courage to simply guess at the form of an equation, the equation we now call the Dirac equation, and to try to interpret it afterwards. "

Richard P. Feynman

" The first principle is that you must not fool yourself and you are the easiest person to fool. "

Richard P. Feynman

" The thing that doesn't fit is the thing that's the most interesting: the part that doesn't go according to what you expected. "

Richard P. Feynman

" Is science of any value? I think a power to do something is of value. Whether the result is a good thing or a bad thing depends on how it is used, but the power is a value. "

Richard P. Feynman

" Because atomic behavior is so unlike ordinary experience, it is very difficult to get used to, and it appears peculiar and mysterious to everyone - both to the novice and to the experienced physicist. "

Richard P. Feynman

" The fact that the colors in the flower have evolved in order to attract insects to pollinate it is interesting; that means insects can see the colors. That adds a question: does this aesthetic sense we have also exist in lower forms of life? "

Richard P. Feynman

" The most remarkable discovery in all of astronomy is that the stars are made of atoms of the same kind as those on the earth. "

Richard P. Feynman

" Einstein's gravitational theory, which is said to be the greatest single achievement of theoretical physics, resulted in beautiful relations connecting gravitational phenomena with the geometry of space; this was an exciting idea. "

Richard P. Feynman

" There were several possible solutions of the difficulty of classical electrodynamics, any one of which might serve as a good starting point to the solution of the difficulties of quantum electrodynamics. "

Richard P. Feynman

" There is nothing that living things do that cannot be understood from the point of view that they are made of atoms acting according to the laws of physics. "

Richard P. Feynman

" I was born not knowing and have had only a little time to change that here and there. "

Richard P. Feynman

" We're always, by the way, in fundamental physics, always trying to investigate those things in which we don't understand the conclusions. After we've checked them enough, we're okay. "

Richard P. Feynman