Richard Feynman

I guess I'm just mischievous. I just love to do that to people. Well especially when they're so gleefully happy that it's been going to cost 13 signatures haha.

You know, the dumbest goddamn student you ever saw can understand things if you explain them right. So if you can’t explain it, it’s because you don’t understand it.

I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong.

What do you care what other people think?

I have a theory that the universe is a great big safe, and that there's a combination to open it. But the combination is locked up in the safe.

Scientific knowledge is a body of statements of varying degrees of certainty—some most unsure, some nearly sure, but none absolutely certain.

I was never a very good student, and I always had trouble with math. I was always in the bottom of the class in math.

I would rather have a world with five billion people that are happy and healthy and well-fed and full of wonderful things than a world with twenty billion people who are starving and miserable.

There is no way to learn anything, except by making mistakes.

You know, the most amazing thing happened to me tonight... I saw the brightest star in the sky. And it was moving!

I just can't understand why people are so interested in what I do. It's just physics.

To not know is a form of knowledge.

I don't believe in the idea of a 'genius.' I believe in the idea of a 'hard worker.'

Why do you suppose that, when you are not speaking English, you speak with an accent?

When we know why, we know what to do.

I'm not a serious person. I'm just a serious scientist.

The greatest joy is to understand how nature works.

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Immediately pay attention to anything that grabs you, and then, with an open mind, go at it and explore it.

Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there.

I object to having my fun regulated.