Man's quest for knowledge is an expanding series whose limit is infinity, but philosophy seeks to attain that limit at one blow, by a short circuit providing the certainty of complete and inalterable truth. Science meanwhile advances at its gradual pace, often slowing to a crawl, and for periods it even walks in place, but eventually it reaches the various ultimate trenches dug by philosophical thought, and, quite heedless of the fact that it is not supposed to be able to cross those final barriers to the intellect, goes right on.

Futurologists have been multiplying like flies since the day Herman Kahn made Cassandra's profession "scientific," yet somehow not one of them has come out with the clear statement that we have wholly abandoned ourselves to the mercy of technological progress. The roles are now reversed: humanity becomes, for technology, a means, an instrument for achieving a goal unknown and unknowable.

Either something is authentic or it is unauthentic, it is either false or true, make-believe or spontaneous life; yet here we are faced with a prevaricated truth and an authentic fake, hence a thing that is at once the truth and a lie.

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.

Practically all SF is trash.

The only writers who have any peace are the ones who don't write. And there are some like that. They wallow in a sea of possibilities. To express a thought, you first have to limit it, and that means kill it. Every word I speak robs me of a thousand others, and every line I write means giving up another.

I never read to kill time. Killing time is like killing someone's wife or a child. There is nothing more precious for me than time.