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.

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

You are younger today than you will ever be again. Make use of it for the sake of tomorrow.

All men - whether they go by the name of Americans or Russians or Chinese or British or Malayans or Indians or Africans - have obligations to one another that transcend their obligations to their sovereign societies.

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

We have learned to live in a world of mistakes and defective products as if they were necessary to life. It is time to adopt a new philosophy in America.

To talk about the need for perfection in man is to talk about the need for another species. The essence of man is imperfection. Imperfection and blazing contradictions-between mixed good and evil, altruism and selfishness, cooperativeness and combativeness, optimism and fatalism, affirmation and negation.