Richard Feynman
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"Richard Phillips Feynman" was an American theoretical physicist known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, and the physics of the superfluidity of supercooled liquid helium, as well as in particle physics (he proposed the parton (particle physics)/parton model). For his contributions to the development of quantum electrodynamics, Feynman, jointly with Julian Schwinger and Sin-Itiro Tomonaga, received the Nobel Prize in Physics in 1965. He developed a widely used pictorial representation scheme for the mathematical expressions governing the behavior of subatomic particles, which later became known as Feynman diagrams. During his lifetime, Feynman became one of the best-known scientists in the world. In a 1999 poll of 130 leading physicists worldwide by the British journal Physics World he was ranked as one of the ten greatest physicists of all time.

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There is no harm in doubt and skepticism, for it is through these that new discoveries are made.

The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.

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.

Science is the belief in the ignorance of the experts.

The real question of government versus private enterprise is argued on too philosophical and abstract a basis. Theoretically, planning may be good. But nobody has ever figured out the cause of government stupidity and until they do (and find the cure) all ideal plans will fall into quicksand.

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

A philosopher once said 'It is necessary for the very existence of science that the same conditions always produce the same results'. Well, they do not. You set up the circumstances, with the same conditions every time, and you cannot predict behind which hole you will see the electron.

We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.

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

I believe that a scientist looking at nonscientific problems is just as dumb as the next guy.

You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird... So let's look at the bird and see what it's doing -- that's what counts. I learned very early the difference between knowing the name of something and knowing something.

There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers.

It's because somebody knows something about it that we can't talk about physics. It's the things that nobody knows anything about we can discuss.

Physics is to math what sex is to masturbation.

No problem is too small or too trivial if we can really do something about it.

Nature has a great simplicity and therefore a great beauty.

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

Physicists like to think that all you have to do is say, these are the conditions, now what happens next?

Philosophers say a great deal about what is absolutely necessary for science, and it is always, so far as one can see, rather naive, and probably wrong.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

The worthwhile problems are the ones you can really solve or help solve, the ones you can really contribute something to.

If you thought that science was certain - well, that is just an error on your part.

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!

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