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

Richard P. Feynman

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" Investigating the forces that hold the nuclear particles together was a long task. "

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" What one fool can understand, another can. "

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" Scientific views end in awe and mystery, lost at the edge in uncertainty, but they appear to be so deep and so impressive that the theory that it is all arranged as a stage for God to watch man's struggle for good and evil seems inadequate. "

Richard P. Feynman

" Working out another system to replace Newton's laws took a long time because phenomena at the atomic level were quite strange. One had to lose one's common sense in order to perceive what was happening at the atomic level. "

Richard P. Feynman

" Often one postulates that a priori, all states are equally probable. This is not true in the world as we see it. This world is not correctly described by the physics which assumes this postulate. "

Richard P. Feynman

" I wanted very much to learn to draw, for a reason that I kept to myself: I wanted to convey an emotion I have about the beauty of the world. "

Richard P. Feynman

" When I would hear the rabbi tell about some miracle such as a bush whose leaves were shaking but there wasn't any wind, I would try to fit the miracle into the real world and explain it in terms of natural phenomena. "

Richard P. Feynman

" The situation in the sciences is this: A concept or an idea which cannot be measured or cannot be referred directly to experiment may or may not be useful. It need not exist in a theory. "

Richard P. Feynman

" We get the exciting result that the total energy of the universe is zero. Why this should be so is one of the great mysteries - and therefore one of the important questions of physics. After all, what would be the use of studying physics if the mysteries were not the most important things to investigate? "

Richard P. Feynman

" For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled. "

Richard P. Feynman

" I decided to sell my drawings. However, I didn't want people to buy my drawings because the professor of physics isn't supposed to be able to draw - isn't that wonderful - so I made up a false name. "

Richard P. Feynman

" People often think I'm a faker, but I'm usually honest, in a certain way - in such a way that often nobody believes me! "

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 necessary to look at the results of observation objectively, because you, the experimenter, might like one result better than another. "

Richard P. Feynman

" From the point of view of basic physics, the most interesting phenomena are, of course, in the new places, the places where the rules do not work - not the places where they do work! That is the way in which we discover new rules. "

Richard P. Feynman

" The extreme weakness of quantum gravitational effects now poses some philosophical problems; maybe nature is trying to tell us something new here: maybe we should not try to quantize gravity. "

Richard P. Feynman

" 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

" 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

" There is a computer disease that anybody who works with computers knows about. It's a very serious disease and it interferes completely with the work. The trouble with computers is that you 'play' with them! "

Richard P. Feynman

" In the Raphael Room, the secret turned out to be that only some of the paintings were made by the great master; the rest were made by students. I had liked the ones by Raphael. This was a big jab for my self-confidence in my ability to appreciate art. "

Richard P. Feynman

" We do not know where to look, or what to look for, when something is memorized. We do not know what it means, or what change there is in the nervous system, when a fact is learned. This is a very important problem which has not been solved at all. "

Richard P. Feynman

" Physics has a history of synthesizing many phenomena into a few theories. "

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

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

Richard P. Feynman

" Because the theory of quantum mechanics could explain all of chemistry and the various properties of substances, it was a tremendous success. But still there was the problem of the interaction of light and matter. "

Richard P. Feynman

" I want to marry Arline because I love her - which means I want to take care of her. That is all there is to it. I want to take care of her. I am anxious for the responsibilities and uncertainties of taking care of the girl I love. "

Richard P. Feynman

" Today, all physicists know from studying Einstein and Bohr that sometimes an idea which looks completely paradoxical at first, if analyzed to completion in all detail and in experimental situations, may, in fact, not be paradoxical. "

Richard P. Feynman

" I thought one should have the attitude of 'What do you care what other people think!' "

Richard P. Feynman

" I think equation guessing might be the best method to proceed to obtain the laws for the part of physics which is presently unknown. Yet, when I was much younger, I tried this equation guessing, and I have seen many students try this, but it is very easy to go off in wildly incorrect and impossible directions. "

Richard P. Feynman

" It always seems odd to me that the fundamental laws of physics, when discovered, can appear in so many different forms that are not apparently identical at first, but, with a little mathematical fiddling, you can show the relationship. "

Richard P. Feynman