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.

We have a lot of people revolutionizing the world because they've never had to present a working model.

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.

Action without intelligence is a form of insanity, but intelligence without action is the greatest form of stupidity in the world.

The difference between intelligence and an education is this: that intelligence will make a good living for you, but education won't do much for you at all.

My definition of an educated man is the fellow who knows the right thing to do at the time it has to be done. You can be sincere and still be stupid.

If you're doing something the same way you have been doing it for ten years, the chances are you are doing it wrong.