I love superconductors.

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.

My past made me a stronger and wiser person because I learned from its valuable lessons without dwelling on regrets and excuses.

They will call you crazy once you stop living someone else’s dream and start living your own.

...my writing is a wild mustang - more thunderous than a lightning storm -and all my skill which I call art, is devoted to simply staying on...

[T]he young and the old of widely different races, both with man and animals, express the same state of mind by the same movements.

It had become boring to write: 'I like Clare Balding'. To say: 'I don't like Clare Balding' is much more newsworthy.

Intuitive diagnosis is reliable when people have a lot of relevant feedback. But people are very often willing to make intuitive diagnoses even when they're very likely to be wrong.

Anybody who thinks that they are a leader and doesn't have anyone following them is just out for a walk.

Architecture and architectural freedom are above all a social issue that must be seen from inside a political structure, not from outside it.

Knowing the Self, God is known.

And who knows which is which and who is who.