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

Why, Robert Singh often wondered, did we give our hearts to friends whose life spans are so much shorter than our own?

A precondition for being a science fiction writer other than an interest in the future is that, an interest - at least an understanding of science, not necessarily a science degree but you must have a feeling for the science and its possibilities and its impossibilities, otherwise you're writing fantasy. Now, fantasy is also fine, but there is a distinction, although no one's ever been able to say just where the dividing lines come.

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 Zeus or Thor, but they have few followers now.

The best proof that there's intelligent life in the universe is that it hasn't come here.

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

The inspirational value of the space program is probably of far greater importance to education than any input of dollars... A whole generation is growing up which has been attracted to the hard disciplines of science and engineering by the romance of space.