"I don't know anything, but I know that I know nothing. And that's the beginning of wisdom."

"The only way to do something is to do it. Not to talk about it, not to plan it, but to do it."

"I was in an intellectual fight with my father, and I kept saying, 'But the books say it!' And he said, 'The books are wrong!'"

"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 think it's much more interesting to live with not knowing than to have answers that might be wrong."