Every honest researcher I know admits he's just a professional amateur. He's doing whatever he's doing for the first time. That makes him an amateur. He has sense enough to know that he's going to have a lot of trouble, so that makes him a professional.

No one would have crossed the ocean if he could have gotten off the ship in the storm.

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

It is easy to build a philosophy - it doesn't have to run

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.

In many ways ideas are more important than people - they are much more permanent.

Do not bring me your successes; they weaken me. Bring me your problems; they strengthen me.