"You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird. You'll only know about humans in different places a…"

"I don't believe in anything, but I have a lot of fun."

"The more you learn, the more you realize how much you don't know."

"Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there."

"I think that when you're doing science, you're trying to find out something that nobody knows."