Stephen Hawking — "I'm an optimist. I think that the human race will find a way to survive."

"I would like to know the mind of God, but I'm not sure God has a mind. He may just be a set of laws."

"I want my books sold on airport bookstalls."

"I have noticed that even people who claim that everything is predetermined and that we can do nothing to change it, look before they cross the road."

"The human failing I would most like to correct is aggression. It may have had survival advantage in caveman days, to get more food, territory or partner with whom to reproduce, but now it threatens to…"

"The universe is a very strange place, and I'm still trying to figure it out."