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.

The severest test of character is not so much the ability to keep a secret as it is, when the secret is finally out, to refrain from disclosing that you knew it all along.

Those obsessed with health are not healthy; the first requisite of good health is a certain calculated carelessness about oneself.

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

Time is love, above all else. It is the most precious commodity in the world and should be lavished on those we care most about.

Sincerity that thinks it is the sole possessor of the truth is a deadlier sin than hypocrisy, which knows better.

When we have "second thoughts" about something, our first thoughts don't seem like thoughts at all - just feelings.