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.

A casual attitude toward human hurt and pain is the surest sign of educational failure.

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.

Death is not the enemy; living in constant fear of it is.

More and more, the choice for the world's people is between becoming world warriors or world citizens.

Wisdom consists of the anticipation of consequences.

The growth of the human mind is still high adventure, in many ways the highest adventure on earth.