The person one loves never really exists, but is a projection focused through the lens of the mind onto whatever screen it fits with least distortion.

There is hopeful symbolism in the fact that flags do not wave in a vacuum.

I have encountered a few "creationists" and because they were usually nice, intelligent people, I have been unable to decide whether they were really mad or only pretending to be mad. If I was a religious person, I would consider creationism nothing less than blasphemy. Do its adherents imagine that God is a cosmic hoaxer who has created the whole vast fossil record for the sole purpose of misleading humankind?

The only way to define your limits is by going beyond them.

It is not easy to see how the more extreme forms of nationalism can long survive when men have seen the Earth in its true perspective as a single small globe against the stars.

This is the first age that's ever paid much attention to the future, which is a little ironic since we may not have one.

'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.