Fantasy is literature for teenagers.

When knowledge becomes formulated into a science, then it does take on a life of it's own, often alien to the human spirit that conceived it.

Science fiction is for real, space opera is for fun.

The day of the android has dawned.

The fatal error of much science fiction has been to subscribe to an optimism based on the idea that revolution, or a new gimmick, or a bunch of strong men, or an invasion of aliens, or the conquest of other planets, or the annihilation of half the world--in short, pretty nearly anything but the facing up to the integral and irredeemable nature of mankind--can bring about utopian situations. It is the old error of the externalization of evil.

When you are young, you enjoy a sustained illusion that sooner or later something marvelous is going to happen, that you are going to transcend your parents' limitations.

I have had wealth, rank and power, but, if these were all I had, how wretched I should be.