Anxiety and conscience are a powerful pair of dynamos. Between them, they have ensured that I shall work hard, but they cannot ensure that one shall work at anything worthwhile.

The world's greatest need . . . is mutual confidence. No human being ever knows all the secrets of another's heart. Yet there is enough confidence between mother and child, husband and wife, buyer and seller . . . to make social life a practical possibility. Confidence may be risky, but it is nothing like so risky as mistrust.

Our western science is a child of moral virtues; and it must now become the father of further moral virtues if its extraordinary material triumphs in our time are not to bring human history to an abrupt, unpleasant and discreditable end.

Civilizations, I believe, come to birth and proceed to grow by successfully responding to successive challenges. They break down and go to pieces if and when a challenge confronts them that they fail to meet.

Of the twenty or so civilizations known to modern Western historians, all except our own appear to be dead or moribund, and, when we diagnose each case... we invariably find that the cause of death has been either War or Class or some combination of the two.

No being can be what he is unless he is putting his essence into action in his field.

A city that outdistances man's walking powers is a trap for man.