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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.

Richard P. Feynman

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Richard P. Feynman
Age: 69 †
Born: 1918
Born: May 11
Died: 1988
Died: February 15
Inventor
Percussionist
Physicist
Politician
Quantum Physicist
Science Communicator
Theoretical Physicist
University Teacher
Writer
Far Rockaway
New York
Richard Phillips Feynman
Richard P. Feynman
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Doubt
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Absolutely
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More quotes by Richard P. Feynman

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Start out understanding religion by saying everything is possibly wrong... As soon as you do that, you start sliding down an edge which is hard to recover from.
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I learned from her that every woman is worried about her looks, no matter how beautiful she is.
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When the problem [quantum chromodynamics] is finally solved, it will all be by imagination. Then there will be some big thing about the great way it was done. But it's simple -it will all be by imagination, and persistence.
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I do believe that there is a conflict between science and religion ... the spirit or attitude toward the facts is different in religion from what it is in science. The uncertainty that is necessary in order to appreciate nature is not easily correlated with the feeling of certainty in faith.
Richard P. Feynman
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As revealed by physics, the truth is so remarkable, so amazing!
Richard P. Feynman
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You do not know anything until you have practiced.
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Today's brains are yesterday's mashed potatoes.
Richard P. Feynman
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If you thought you were trying to find out more about it because you're gonna get an answer to some deep philosophical question...you may be wrong! It may be that you can't get an answer to that particular question by finding out more about the character of nature. But my interest in science is to simply find out about the world.
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Unless a thing can be defined by measurement, it has no place in a theory. And since an accurate value of the momentum of a localized particle cannot be defined by measurement it therefore has no place in the theory.
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I love to think. I once considered taking drugs as an attempt to better understand an altered state of mind however, I decided not to. I didn't want to chance ruining the machine.
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To not know math is a severe limitation to understanding the world.
Richard P. Feynman
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In physics the truth is rarely perfectly clear, and that is certainly universally the case in human affairs. Hence, what is not surrounded by uncertainty cannot be the truth.
Richard P. Feynman
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(Joan,1941) She wrote me a letter asking,How can I read it?,Its so hard. I told her to start at the beginning and read as far as you can get until you're lost. Then start again at the beginning and keep working through until you can understand the whole book. And thats what she did
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The only way to deep happiness is to do something you love to the best of your ability
Richard P. Feynman
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It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.
Richard P. Feynman
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We are lucky to live in an age in which we are still making discoveries.
Richard P. Feynman
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Work hard to find something that fascinates you.
Richard P. Feynman
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One does not, by knowing all the physical laws as we know them today, immediately obtain an understanding of anything much. I love only nature, and I hate mathematicians.
Richard P. Feynman
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I, a universe of atoms, an atom in the universe.
Richard P. Feynman
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Nature has a great simplicity and therefore a great beauty.
Richard P. Feynman