A science fiction story is one which presupposes a technology, or an effect of technology, or a disturbance in the natural order, such as humanity, up to the time of writing, has not in actual fact experienced.

The most romantic creation to have come out of regret is time-travel.

“Books are keys that open many doors”

Individual science fiction stories may seem as trivial as ever to the blinder critics and philosophers of today – but the core of science fiction, its essence has become crucial to our salvation if we are to be saved at all.

[Social] science fiction is that branch of literature which is concerned with the impact of scientific advance on human beings.

One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.

Write me a creature that thinks as well as a man or better than a man, but not like a man.

The main thing about aliens is that they are alien. They feel no responsibility for fulfilling any of your expectations.

In short, the straw of a manufactured realism with which the sf writer makes his particular literary bricks must be entirely convincing to the reader in it own right, or the whole story will lose its power to convince.

All worlds of fiction are alternative realities.

You must stay drunk on writing so reality cannot destroy you.

All responsible writers, to some degree, have become involuntary criers of doom, because doom is in the wind; but science fiction writers more so, since science fiction has always been a protest medium.