Skepticism is not an end in itself; it is a tool for the discovery of truths.

Nuclear war is inevitable, says the pessimists; Nuclear war is impossible, says the optimists; Nuclear war is inevitable unless we make it impossible, says the realists.

Self-discipline without talent can often achieve astounding results, whereas talent without self-discipline inevitably dooms itself to failure.

If the devil could be persuaded to write a bible, he would title it, "You Only Live Once."

A famously wise old man in a village was once asked how he came by his wisdom. "I got it from my good judgment," he answered. And where did his good judgment come from? "I got it from my bad judgment."

By the time a man asks you for advice, he has generally made up his mind what he wants to do, and is looking for confirmation rather than counseling.

The primary purpose of a liberal education is to make one's mind a pleasant place in which to spend one's leisure.