"I was very surprised that a lot of artists, when they found out I was a scientist, they would start telling me about their theories of the universe, and they were always crackpot theories."

"I feel that if a man has a problem, it's not solved unless he understands it."

"I'm not a humanitarian. I'm a scientist."

"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 was never a very good student, and I always had trouble with math. I was always in the bottom of the class in math."