The witnessing of titanic events is always dangerous, usually painful, and often fatal.

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.

A moment spent in Sorrow or a moment spent in Pain is a waste of a Great Treasure that you will never get again.

The only valid rule for a work of art is that it be true to itself.

...the tongues of men are not much leashed by concerns for accuracy or truth.

And upsidedown in the earth a dead man walks upon my soles when I walk.

Love cannot express the idea of music, while music may give an idea of love

If you can't write like New York, you have no business living in New York and making New York the locale of your stories.

I think it's really hard being in a boy band. There's a lot of dynamics.

But how can you walk away from something and still come back to it?

The Church of Christ, therefore, is one and the same forever.

I just think I'm better equipped to make a study of human personality than trying to get into the mind of animals.