"A technique succeeds in mathematical physics, not by a clever trick, or a happy accident, but because it expresses some aspect of a physical truth."

"Wisdom is harder to DO than it is to know."

"It is twice as hard to crush a half-truth as a whole lie."

"If a pessimist is always right, is he a realist?"

"Do you want to know the secret of pain? If you just stop feeling it, you can start to use it."

"I use emotion for the many and reserve reason for the few."

"Don't look back: Something may be gaining on you."

"Politics: 'The conduct of public affairs for private advantage.'"

"If a cluttered desk is the sign of a cluttered mind, what is the significance of a clean desk?"

"It's never too late, in fiction or in life, to revise."

"Teach children to be polite and courteous in the home, and, when he grows up, he will never be able to edge his car onto a freeway."

"I'm the only person I know that's lost a quarter of a billion dollars in one year.... It's very character-building."