Religion is a culture of faith; science is a culture of doubt..

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

You can always recognize truth by its beauty and simplicity..

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..

Don't pay attention to "authorities," think for yourself..

If you can't explain something to a first year student, then you haven't really understood ..

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know.".

We never are definitely right, we can only be sure we are wrong..

[B]eyond poverty, beyond the point that the material needs are reasonably satisfied, only from within is peace..

It is impossible, by the way, when picking one example of anything, to avoid picking one which is atypical in some sense..

The test of all knowledge is experiment. Experiment is the sole judge of scientific truth..

What I cannot create, I do not understand..

[When a young person loses faith in his religion because he begins to study science and its methodology] it isn't that [through the obtaining of real….

I think we can safely assume that no one understands quantum mechanics..

The game I play is a very interesting one. It's imagination, in a tight straightjacket..

It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible..

Physics is not the most important thing. Love is..

But the real glory of science is that we can find a way of thinking such that the law is evident..

If a guy tells me the probability of failure is 1 in 100,000, I know he's full of crap..

The principle of science, the definition, almost, is the following: The test of all knowledge is experiment. Experiment is the sole judge of scientif….

We decided that 'trivial' means 'proved'. So we joked with the mathematicians: We have a new theorem- that mathematicians can prove only trivial theo….