Modern science fiction is the only form of literature that consistently considers the nature of the changes that face us.

The final end of Eternity, and the beginning of Infinity

Suppose that we are wise enough to learn and know - and yet not wise enough to control our learning and knowledge, so that we use it to destroy ourselves? Even if that is so, knowledge remains better than ignorance. It is better to know - even if the knowledge endures only for the moment that comes before destruction - than to gain eternal life at the price of a dull and swinish lack of comprehension of a universe that swirls unseen before us in all its wonder. That was the choice of Achilles, and it is mine, too.

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

One might accept death reasoningly, with every aspect of the conscious mind, but the body was a brute beast that knew nothing of reason.

The Earth should not be cut up into hundreds of different sections, each inhabited by a self-defined segment of humanity that considers its own welfare and its own "national security" to be paramount above all other consideration.

You show me someone who can't understand people and I'll show you someone who has built up a false image of himself.