Can the synthesis of man and machine ever be stable, or will the purely organic component become such a hindrance that it has to be discarded?

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.

Only small minds are impressed by large numbers.

'The Devil in the Dark' impressed me because it presented the idea, unusual in science fiction then and now, that something weird, and even dangerous, need not be malevolent. That is a lesson that many of today's politicians have yet to learn.

But please remember: this is only a work of fiction. The truth, as always, will be far stranger.

When you finally understand the universe, it will not only be stranger than you imagine, it will be stranger than you can imagine.

The more wonderful the means of communication, the more trivial, tawdry, or depressing its contents seemed to be.