We learn only to ask more questions.

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.

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.

The gods do not protect fools. Fools are protected by more capable fools.

Your body language continuously communicates for you, whether you are aware of it or not. Are your intended messages being well conveyed?

I have forgotten all about my school days. I have a vague impression that they were detestable.

A single soul is richer than all the worlds.

Art is skill, that is the first meaning of the word.

Love never reasons, but profusely gives, Gives, like a thoughtless prodigal, its all, And trembles then, lest it has done too little.

Our whole being is nothing but a fight against the dark forces within ourselves.

Not only the Jew, but also all that is derived from the Jewish mind, corrodes and disintegrates what is best in us.

Attention to the human body brings healing and regeneration. Through awareness of the body we remember who we really are.

I have long felt that the way to keep children out of trouble is to keep them interested in things.

I have always believed that fashion was not only to make women more beautiful, but also to reassure them, give them confidence.