“Smoking kills. If you’re killed, you’ve lost a very important part of your life.”

“I don’t think success is harmful, as so many people say. Rather, I believe it indispensable to talent, if for nothing else than to increase the talent.”

“We can learn nothing except by going from the known to the unknown.”

“Writing books is the closest men ever come to childbearing.”

“Aim for the moon. If you miss, you may hit a star.”