The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance, I think. When a scientist doesn’t know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty damn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress, we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty — some most unsure, some nearly sure, but none absolutely certain. Now, we scientists are used to this, and we take it for granted that it is perfectly consistent to be unsure, that it is possible to live and not know. But I don’t know whether everyone realizes this is true. Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question — to doubt — to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.
Richard Feynman
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More Richard Feynman
Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not real... RICHARD FEYNMAN For a successful technology, reality must take precedence over public relations, for Nature canno... RICHARD FEYNMAN Listen, buddy, if I could tell you in a minute what I did, it wouldn't be worth the Nobel Prize. RICHARD FEYNMAN I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live n... RICHARD FEYNMAN I think it's much more interesting to live not knowing than to have answers which might be wrong. I ... RICHARD FEYNMAN Well, Mr. Frankel, who started this program, began to suffer from the computer disease that anybody ... RICHARD FEYNMAN Study hard what interests you the most in the most undisciplined, irreverent and original manner pos... RICHARD FEYNMAN Physics is like sex: sure, it may give some practical results, but that's not why we do it. RICHARD FEYNMAN The first principle is that you must not fool yourself - and you are the easiest to fool. RICHARD FEYNMAN We are at the very beginning of time for the human race. It is not unreasonable that we grapple with... RICHARD FEYNMAN I don't know what's the matter with people: they don't learn by understanding, they learn by some ot... RICHARD FEYNMAN For a successful technology, reality must take precedence over public relations, for Nature cannot b... RICHARD FEYNMAN (I) once asked Richard Feynman whether he thought of mathematics and, by extension, the laws of phys... RICHARD FEYNMAN Is no one inspired by our present picture of the universe? Our poets do not write about it; our arti... RICHARD FEYNMAN We have a habit in writing articles published in scientific journals to make the work as finished as... RICHARD FEYNMAN Physics is like sex: sure, it may give some practical results,but that's not why we do it. RICHARD FEYNMAN If you're teaching a class, you can think about the elementary things that you know very well. These... RICHARD FEYNMAN Religion is a culture of faith; science is a culture of doubt. RICHARD FEYNMAN (Joan,1941) She wrote me a letter asking,"How can I read it?,Its so hard." I told her to start at th... RICHARD FEYNMAN I... a universe of atoms, an atom in the universe. RICHARD FEYNMAN I would rather have questions that can't be answered than answers that can't be questioned. RICHARD FEYNMAN I have a friend who's an artist and has sometimes taken a view which I don't agree with very well. H... RICHARD FEYNMAN The real question of government versus private enterprise is argued on too philosophical and abstrac... RICHARD FEYNMAN A philosopher once said 'It is necessary for the very existence of science that the same conditions ... RICHARD FEYNMAN It's because somebody knows something about it that we can't talk about physics. It's the things tha... RICHARD FEYNMAN I was born not knowing and have only had a little time to change that here and there. RICHARD FEYNMAN The worthwhile problems are the ones you can really solve or help solve, the ones you can really con... RICHARD FEYNMAN No problem is too small or too trivial if we can really do something about it. RICHARD FEYNMAN There is no harm in doubt and skepticism, for it is through these that new discoveries are made. RICHARD FEYNMAN I was born not knowing and have had only a little time to change that here and there. RICHARD FEYNMAN The first principle is that you must not fool yourself - and you are the easiest person to fool. RICHARD FEYNMAN You can know the name of a bird in all the languages of the world, but when you're finished, you'll ... RICHARD FEYNMAN There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion.... RICHARD FEYNMAN Physicists like to think that all you have to do is say, these are the conditions, now what happens ... RICHARD FEYNMAN Philosophers say a great deal about what is absolutely necessary for science, and it is always, so f... RICHARD FEYNMAN I believe that a scientist looking at nonscientific problems is just as dumb as the next guy. RICHARD FEYNMAN Poets say science takes away from the beauty of the stars - mere globs of gas atoms. I, too, can see... RICHARD FEYNMAN If I could explain it to the average person, I wouldn't have been worth the Nobel Prize. RICHARD FEYNMAN I'm smart enough to know that I'm dumb. RICHARD FEYNMAN Einstein was a giant. His head was in the clouds, but his feet were on the ground. Those of us who a... RICHARD FEYNMAN The first principle is that you must not fool yourself and you are the easiest person to fool. RICHARD FEYNMAN If you thought that science was certain - well, that is just an error on your part. RICHARD FEYNMAN Physics is like sex. Sure, it may give some practical results, but that's not why we do it. RICHARD FEYNMAN The difficulty really is psychological and exists in the perpetual torment that results
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FEYNMAN Once you have a computer that can do a few things - strictly speaking, one that has a certain 's... RICHARD P. FEYNMAN I think equation guessing might be the best method to proceed to obtain the laws for the part of phy... RICHARD P. FEYNMAN Einstein's gravitational theory, which is said to be the greatest single achievement of theoreti... RICHARD P. FEYNMAN If we have an atom that is in an excited state and so is going to emit a photon, we cannot say when ... RICHARD P. FEYNMAN When I would hear the rabbi tell about some miracle such as a bush whose leaves were shaking but the... RICHARD P. FEYNMAN We do not know where to look, or what to look for, when something is memorized. We do not know what ... RICHARD P. FEYNMAN From the point of view of basic physics, the most interesting phenomena are, of course, in the new p... RICHARD P. FEYNMAN The correct statement of the laws of physics involves some very unfamiliar ideas which require advan... RICHARD P. FEYNMAN I've always been very one-sided about science, and when I was younger, I concentrated almost all... RICHARD P. FEYNMAN Often one postulates that a priori, all states are equally probable. This is not true in the world a... RICHARD P. FEYNMAN Once I get on a puzzle, I can't get off. RICHARD P. FEYNMAN Today we say that the law of relativity is supposed to be true at all energies, but someday somebody... RICHARD P. FEYNMAN I practiced drawing all the time and became very interested in it. If I was at a meeting that wasn... RICHARD P. FEYNMAN If you keep proving stuff that others have done, getting confidence, increasing the complexities of ... RICHARD P. FEYNMAN The situation in the sciences is this: A concept or an idea which cannot be measured or cannot be re... RICHARD P. FEYNMAN Physics has a history of synthesizing many phenomena into a few theories. RICHARD P. FEYNMAN Because atomic behavior is so unlike ordinary experience, it is very difficult to get used to, and i... RICHARD P. FEYNMAN The original reason to start the project, which was that the Germans were a danger, started me off o... RICHARD P. FEYNMAN It has not yet become obvious to me that there's no real problem. I cannot define the real probl... RICHARD P. FEYNMAN We are at the very beginning of time for the human race. It is not unreasonable that we grapple with... RICHARD P. FEYNMAN I was terrible in English. I couldn't stand the subject. It seemed to me ridiculous to worry abo... RICHARD P. FEYNMAN I was a very shy character, always feeling uncomfortable because everybody was stronger than I, and ... RICHARD P. FEYNMAN If you realize all the time what's kind of wonderful - that is, if we expand our experience into... RICHARD P. FEYNMAN I don't understand what it's all about or what's worth what, but if the people in the Sw... RICHARD P. FEYNMAN Atoms are very special: they like certain particular partners, certain particular directions, and so... RICHARD P. FEYNMAN The fact is that a bill allowing any employer to deny insurance coverage based on a moral objection ... RICHARD CARMONA One of the great cosmic laws, I think, is that whatever we hold in our thought will come true in our... RICHARD BACH The first step towards knowledge is to know that we are ignorant. RICHARD CECIL From my very first day as an entrepreneur, I've felt the only mission worth pursuing in business... RICHARD BRANSON I am fond of them, of the inferior beings of the abyss, of those who are full of longing. RICHARD WAGNER There's something about shadows because you make your own mind up about what's lurking in th... RICHARD O'BRIEN I hate cameras. They interfere, they're always in the way. I wish: if I could work with my eyes ... RICHARD AVEDON Primates need good nutrition, to begin with. Not only fruits and plants, but insects as well. RICHARD LEAKEY I gave my life to become the person I am right now. Was it worth it? RICHARD BACH Learning is finding out what you already know. RICHARD BACH Our soulmate is the one who makes life come to life. RICHARD BACH Strong beliefs win strong men, and then make them stronger. RICHARD BACH