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 possibility of war increases in direct proportion to the effectiveness of the instruments of war.

It is well known that panic, despair, depression, hate, rage, exasperation, frustration all produce negative biochemical changes in the body.

Never deny a diagnosis, but do deny the negative verdict that may go with it.

The essence of man is imperfection.

The capacity for hope is the most significant fact of life. It provides human beings with a sense of destination and the energy to get started.

Of all the gifts bestowed by nature on human beings, hearty laughter must be close to the top.