The tragedy of life is in what dies inside a man while he lives - the death of genuine feeling, the death of inspired response, the awareness that makes it possible to feel the pain or the glory of other men in yourself.

The life-force may be the least understood force on earth.

You are younger today than you will ever be again. Make use of it for the sake of tomorrow.

We will not have peace by afterthought.

Hope, purpose and determination are not merely mental states. They have electrochemical connections that affect the immune system.

For every low there is an equal but opposite high.

I've learned that next to the atomic bomb, the greatest danger is defeatism, despair, and inadequate awareness of what human beings possess. I feel that any problem that can be defined is capable of being resolved. Out of this has come my conviction that no person knows enough to be a pessimist.