"I don't feel frightened by not knowing things, by being lost in a mysterious universe without any purpose, which is the way it really is, as far as I can tell, possibly. It doesn't frighten me."

"To every man is given the key to the gates of heaven; the same key opens the gates of hell."

"When I was in high school, I'd read about the great scientists and I was ashamed that I was not a great scientist. I used to think, 'What's the matter with me? I'm not a great scientist.'"

"Religion is a culture of faith; science is a culture of doubt."

"I don't want to be a part of the establishment. I want to be an outsider."