"The great thing about science is that it's a way of not fooling yourself."

"To every man is given the key to the gates of heaven; the same key opens the gates of hell."

"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 see my physics students don't understand it... That is because I don't understand it. Nobody does."

"I don't need a theory, I just want to know what the hell is going on."