"It's a great thing to be able to say, 'I don't know.'"

"Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply e…"

"I would often go to these conferences where they would talk about the ultimate theory, and I would always say, 'What's the ultimate experiment?'"

"Yeah, I took the door."

"There is no way to learn anything, except by making mistakes."