If one must explain a magic trick, one should do so after the show is over.

Ethics change with technology.

SF isn't a genre; SF is the matrix in which genres are embedded, and because the SF field is never going in any one direction at any one time, there is hardly a way to cut it off.

The human species really could have faced global thermonuclear war. During seventy years of Cold War we grew used to it.

Everything starts as somebody's daydream.

In the world of words the imagination is one of the forces of nature.

In hindsight it may even seem inevitable that a socialist society will starve when it runs out of capitalists.

You learn by writing short stories. Keep writing short stories. The money's in novels, but writing short stories keeps your writing lean and pointed.

We learn only to ask more questions.

It's very difficult for a black man to get out of South-Central Los Angeles, and get out civilized....The only men I know who have escaped, all began reading Robert Heinlein at age ten.

One mark of a good officer, he remembered, was the ability to make quick decisions. If they happen to be right, so much the better.

I value loyalty more than money

God indeed has given the earth under to the control of man.

Our thoughts deceive us more than our senses.

Cynicism, like gullibility, is a symptom of underdeveloped critical faculties.

Trust processes as well as people.

Giving builds loyal customers and turns those customers into supporters...You can find passion and profit and meaning all at once, right now.

If we allow everything access to our mind, we are simply asking to be kept in a state of mental turmoil or bondage. For nothing enters the mind without having an effect for good or evil.

I sometimes think humor and satire are more effective techniques for expressing social statements than direct comment.

If it is true that there is always more than one way of construing a text, it is not true that all interpretations are equal.