"I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken-down computers; that is a fairy story for people afraid of the dark."

"The human race is a single genetic stock, and we are all brothers and sisters. It's time that we started to act like it."

"The universe is a constant source of wonder and inspiration."

"I think that the human race has a great future ahead of it, if we can just learn to cooperate."

"God did not create the universe and does not direct our fate."