Civilizaton is the interval between Ice Ages.

Moral codes adjust themselves to environmental conditions.

That a few simple men should in one generation have invented so powerful and appealing a personality, so lofty ethic, and so inspiring a vision of human brotherhood, would be a miracle far more incredible than any recorded in the Gospels.

If a man is fortunate he will, before he dies, gather up as much as he can of his civilized heritage and transmit it to his children.

The trouble with most people is that they think with their hopes or fears or wishes rather than with their minds.

Read, think well of mankind, go to our libraries and rejoice.

And last are the few whose delight is in meditation and understanding; who yearn not for goods, nor for victory, but for knowledge; who leave both market and battlefield to lose themselves in the quiet clarity of secluded thought; whose will is a light rather than a fire, whose haven is not power but truth: these are the men of wisdom, who stand aside unused by the world.