None but the weak crave to be better than. Strong men are satisfied with their own strength.

When you stop learning, stop listening, stop looking and asking questions, always new questions, then it is time to die.

To believe in something not yet proved and to underwrite it with our lives: It is the only way we can leave the future open.

The question in crisis or ordeal is not: Are you going to be an extremist? The question is: What kind of extremist are you going to be?

To believe in something not yet proved and to underwrite it with our lives: it is the only way we can leave the future open. Man, surrounded by facts, permitting himself no surmise, no intuitive flash, no great hypothesis, no risk, is in a locked cell. Ignorance cannot seal the mind and imagination more surely.

Man, born of woman, has found it a hard thing to forgive her for giving him birth. The patriarchal protest against the ancient matriarch has borne strange fruit through the years.

Faith and doubt both are needed - not as antagonists, but working side by side to take us around the unknown curve.