The Product of Freedom and Security is a constant (F X S = k). Giving up freedom for security is beginning to look naive.

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.

We do not learn for the benefit of anyone, we learn to unlearn ignorance.

We are all wonderful souls.

Clever, witty and absorbing, Amortality is a much-needed anatomy of our profound malaise about ageing. Its charms will never fade.

A fertile soil alone does not carry agriculture to perfection.

I'm exhausted almost all the time.

I am a Christian. That obliges me to be a Communist.

Talking to you is like -- like talking to an eel!" "No, is it? I've never tried to talk to an eel. Isn't it as waste of time?" "Not such a waste of time as talking to you!

I really liked watching Bo Jackson run just because of his size and his speed.

The core of the American public, their hearts and their minds are in the right place. And that gives me hope.

My father cried when I said I wanted to be a chef.