"The more you learn, the more you learn how little you know."

"I don't think I'm a very good teacher. I just try to explain things clearly."

"I would rather have questions that can't be answered than answers that can't be questioned."

"I have a friend who's an artist and has sometimes taken a view which I don't agree with. He'll hold up a flower and say, 'Look how beautiful it is,' and I'll agree. Then he says, 'You see, as a scient…"

"It doesn't seem to me that this fantastically marvelous universe, this tremendous range of time and space and different kinds of animals, and all the different planets, and all these atoms with all th…"