Enthusiasm... the sustaining power of all great action.

I am not ashamed to confess that I am ignorant of what I do not know.

One of the great penalties those of us who live our lives in full view of the public must pay is the loss of that most cherished birthright of man's, privacy.

Wisely, and slow. They stumble that run fast.

Genius is sorrow's child.

There's nothing in the world so demoralizing as money.

We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.

Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense.

Hope is like the sun, which, as we journey toward it, casts the shadow of our burden behind us.

When one door is closed, don't you know that many more are open

Domination delegates the physical violence on which it rests to the dominated.

The more you like yourself, the less you are like anyone else, which makes you unique.

I don't try to imagine a personal god; it suffices to stand in awe at the structure of the world, insofar as it allows our inadequate senses to appreciate it.

Common looking people are the best in the world: that is the reason the Lord makes so many of them.

When the dog looks at you, the dog is not thinking what kind of a person you are. The dog is not judging you.

The right of a nation to kill a tyrant in case of necessity can no more be doubted than to hang a robber, or kill a flea.

The hardest thing to explain is the glaringly evident which everybody has decided not to see.

There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.

The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.

There is no real ending. It's just the place where you stop the story.

Genius is one percent inspiration and ninety-nine percent perspiration.