If man can live in Manhattan, he can live anywhere..

Science can destroy religion by ignoring it as well as by disproving its tenets. No one ever demonstrated, so far as I am aware, the nonexistence of ….

Space can be mapped and crossed and occupied without definable limit; but it can never be conquered. When our race has reached its ultimate achieveme….

Almost any seat was comfortable at one-sixth of a gravity..

It is really quite amazing by what margins competent but conservative scientists and engineers can miss the mark, when they start with the preconceiv….

Never attribute to malevolence what is merely due to incompetence.

Death focuses the mind on the things that really matter: why are we here, and what should we do?.

Some things have eternal value, and compassion is one of them. I hope we never lose that. Compassion for humans as well as animals..

There is the possibility that humankind can outgrow its infantile tendencies, as I suggested in 'Childhood's End.' But it is amazing how childishly g….

Science fiction seldom attempts to predict the future. More often than not, it tries to prevent the future..

A single test which proves some piece of theory wrong is more valuable than a hundred tests showing that idea might be true..

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..

Once you can reproduce a phenomenon, you are well on the way to understanding it..

A man who grows that much hair,' critics were fond of saying, 'must have a lot to hide..

The best measure of a man's honesty isn't his income tax return. It's the zero adjust on his bathroom scale..

The exploration of the planets is now closer to us in time than the exploration of Africa by Stanley and Livingstone..

Now times had changed, and the inherited wisdom of the past had become folly..

Belief in God is apparently a psychological artifact of mammalian reproduction..

Others, one suspects, are afraid that the crossing of space , and above all contact with intelligent but nonhuman races, may destroy the foundations ….

You can't have it both ways. You can't have both free will and a benevolent higher power who protects you from yourself..

The inspirational value of the space program is probably of far greater importance to education than any input of dollars... A whole generation is gr….