"I would like to add a third possibility, that it might be that, when we die, we just die, and that's the end of it."

"I don't know what's the matter with people: they don't learn by understanding; they learn by some other way — by rote or something. Their knowledge is so fragile!"

"The only way to do great work is to love what you do."

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

"The fact that I can even ask the question, 'What is the mind?' means that the mind is a part of the universe."