The perversity of the Universe tends towards a maximum.

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.

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

In general, I don't know when inspiration will pop up.

My problem with new writers is that it takes me five or six years to memorise the right names.

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

I love superconductors.