I have learned never to underestimate the capacity of the human mind and body to regenerate - even when prospects seem most wretched. The life force may be the least understood force on earth.

The old emphasis upon superficial differences that separate peoples must give way to education for citizenship in the human community.

If the United Nations is to survive, those who represent it must bolster it; those who advocate it must submit to it; and those who believe in it must fight for it.

Optimism doesn't wait on facts. It deals with prospects. Pessimism is a waste of time.

Cynicism is intellectual treason.

We have everything we need, in fact, except the most important thing of all — time to think and the habit of thought.

The individual is capable of both great compassion and great indifference. He has it within his means to nourish the former and outgrow the latter.