"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…"

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

"The game is to find out how nature works."

"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!"

"Why do you suppose that, when you are not speaking English, you speak with an accent?"