Consider the true picture. Think of myriads of tiny bubbles, very sparsely scattered, rising through a vast black sea. We rule some of the bubbles. Of the waters we know nothing.

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

Half of wisdom is learning what to unlearn.

Intelligence is just a tool to be used toward a goal, and goals are not always chosen intelligently.

The best advice I was ever given was on my twenty-first birthday when my father said, Son, here's a million dollars. Don't lose it.

Never tell a computer to forget it.

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.