"I had a lot of fun, and I'm very glad I was born."

"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. Immediately pay attention to anything that grabs you, and then, wi…"

"I don't believe in anything, but I have a lot of fun."

"I think that when you're doing science, you're trying to find out something that nobody knows."

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