"I feel that if a man has a problem, it's not solved unless he understands it."

"Physics is like sex: sure, it may give some practical results, but that's not why we do it."

"I don't know anything about anything."

"God is always associated with those things that you do not understand. Therefore I don't think that the laws can be considered to be like God because they have been figured out. ... But you need him f…"

"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…"