"I don't think I'm a very good teacher. I just try to explain things clearly."

"I was very surprised when I got the Nobel Prize. I didn't think I deserved it."

"I asked him once, 'How do you tell when a mathematical argument is correct?' He said, 'If it's beautiful, it's correct.'"

"God was invented to explain mystery. God is always invented to explain those things that you do not understand."

"I have often thought that if I were to be reborn, I'd like to be a biologist."