People are entirely too disbelieving of coincidence.

To test a perfect theory with imperfect instruments did not impress the Greek philosophers as a valid way to gain knowledge.

I have never written a book that didn't teach me far more than it taught my reader.

Democracy cannot survive overpopulation. Human dignity cannot survive it. Convenience and decency cannot survive it. As you put more and more people into the world, the value of life not only declines, but it disappears. It doesn't matter if someone dies.

I don't believe in personal immortality; the only way I expect to have some version of such a thing is through my books.

Computerization eliminates the middleman

The age of the pulp magazine was the last in which youngsters, to get their primitive material, were forced to be literate.