I could do nothing without my problems; they toughen my mind. In fact, I tell my assistants not to bring me their successes for they weaken me, but rather to bring me their problems, for they strengthen me.

Every father should remember one day his son will follow his example, not his advice.

I am not interested in the past. I am interested in the future, for that is where I expect to spend the rest of my life.

Thinking is one thing no one has ever been able to tax.

If I want to stop a research program I can always do it by getting a few experts to sit in on the subject, because they know right away that it was a fool thing to try in the first place.

I expect to spend the rest of my life in the future, so I want to be reasonably sure of what kind of future it's going to be. That is my reason for planning.

A man must have a certain amount of intelligent ignorance to get anywhere.