Strange! I don't understand how it is that we can write mathematical expressions and calculate what the thing is going to do without being able to picture it.

It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions.

It does not make any difference how beautiful your guess is. It does not make any difference how smart you are, who made the guess, or what his name is if it disagrees with experiment it is wrong. That is all there is to it.

If science is to progress, what we need is the ability to experiment, honesty in reporting results—the results must be reported without somebody saying what they would like the results to have been—and finally—an important thing—the intelligence to interpret the results.

When you're thinking about something that you don't understand, you have a terrible, uncomfortable feeling called confusion... Now, is the confusion's because we're all some kind of apes that are kind of stupid working against this, trying to figure out [how] to put the two sticks together to reach the banana and we can't quite make it... So I always feel stupid. Once in a while, though, the sticks go together on me and I reach the banana.

We have this terrible struggle to try to explain things to people who have no reason to want to know.

I think Nature's imagination is so much greater than man's, she's never gonna let us relax!