The most costly disease is boredom costly for both individual and society.

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.

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.

The message from the moon which we have flashed to the far corners of this planet is that no problem need any longer be considered insoluble.

Respect for the fragility and importance of an individual life is still the mark of an educated man.

We will not have peace by afterthought.

The greatest force in the human body is the natural drive of the body to heal itself - but that force in not independent of the belief system. Everything begins with belief. What we believe is the most powerful option of all.