"I would rather have a world with five billion people that didn't know how to read than a world with five billion people that all knew how to read and all thought the same thing."

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

"The age of ignorance is past. The age of reason is here. And it will be a glorious age, if we but choose to make it so."

"The thing that I cannot understand is what I cannot create. And I can't create a universe. So I don't understand the universe."

"I have a great deal of difficulty with the idea of 'truth' in the philosophical sense."