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.

Just as there is no loss of basic energy in the universe, so no thought or action is without its effects, present or ultimate, seen or unseen, felt or unfelt.

Pessimism is a waste of time.

The way a book is read, which is to say, the qualities a reader brings to a book can have as much to do with its worth as anything the author puts into it.

Progress begins with the belief that what is necessary is possible.

What was significant about the laughter . . . was not just the fact that it provides internal exercise for a person . . . form of jogging for the innards, but that it creates a mood in which the other positive emotions can be put to work, too.

My reason nourishes my faith and my faith my reason.