Selfishness is the bedrock on which all moral behavior starts and it can be immoral only when it conflicts with a higher moral imperative.

Sovereign," like "love," means anything you want it to mean; it's a word in dictionary between "sober" and "sozzled.

Don't explain computers to laymen. Simpler to explain sex to a virgin.

Always listen to experts. They'll tell you what can't be done, and why. Then do it.

A handy short definition of almost all science fiction might read: realistic speculation about possible future events, based solidly on adequate knowledge of the real world, past and present, and on a thorough understanding of the nature and significance of the scientific method.

Liberty is never unalienable, it must be redeemed regularly with the blood of patriots or it always vanishes.

A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.