"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…"

"You're an idiot."

"The universe is a beautiful and complex place, and we are lucky to be a part of it."

"I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first."

"I think that the universe is a beautiful and complex place, and I'm very lucky to be able to study it."