Man is not imprisoned by habit. Great changes in him can be wrought by crisis - once that crisis can be recognized and understood.

Pessimism is a waste of time.

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.

Time given to thought is the greatest time saver of all.

The great challenge of the '90s... is to salvage and improve the UN and to develop it into an agency capable of meeting the wide range of serious problems that are inherent in a world that has become a single geographic unit.

Pain is part of the body's magic. It is the way the body transmits a sign to the brain that something is wrong.

All things are possible, once enough human beings realize that everything is at stake.