We have no need of other worlds. We need mirrors. We don't know what to do with other worlds. A single world, our own, suffices us; but we can't accept it for what it is.

Man has gone out to explore other worlds and other civilizations without having explored his own labyrinth of dark passages and secret chambers, and without finding what lies behind doorways that he himself has sealed.

Our ability to adapt and therefore to accept everything is one of our greatest dangers. Creatures that are completely flexible, changeable, can have no fixed morality.

Practically all SF is trash.

A man who for an entire week does nothing but hit himself over the head has little reason to be proud.

The horse respects and obeys man because its large eyes magnify everything, so man appears much larger than the horse itself.

The war of good and evil present in all religions does not always end, in every faith, with the victory of good, but in every one it establishes a clear order of existence. The sacred as well as the profane rests on that universal order.