"I was talking to a guy who was a philosopher, and he said, 'But you're just describing the world, you're not explaining it.' And I said, 'Yeah, that's what science is. We describe it. We don't explain…"

"I don't believe in God. I don't believe in anything. I'm a scientist."

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

"I have a friend who is an artist and has some pictures which he thinks are very good... and he says, 'I am a value-free man. I don't believe in values.' And I say, 'Oh, really? Then why are your pictu…"

"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…"