"The greatest joy is to understand how nature works."

"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 don't know anything about anything."

"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.'"

"The easiest way to fool yourself is to believe something because you want it to be true."