"The thing that I cannot understand is what I cannot create. And I can't create a universe. So I don't understand the universe."

"It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong."

"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!'"

"There is no such thing as a miracle. There is only what we don't understand yet."

"When I was in high school, I'd read about the great scientists and I was ashamed that I was not a great scientist. I used to think, 'What's the matter with me? I'm not a great scientist.'"