The realisation that our small planet is only one of many worlds gives mankind the perspective it needs to realise sooner that our own world belongs to all its creatures.

One theory which can no longer be taken very seriously is that UFOs are interstellar spaceships.

Humor was the enemy of desire.

Guns are the crutches of the impotent.

The moment when one first meets a great work of art has an impact that can never again be recaptured.

One of the biggest roles of science fiction is to prepare people to accept the future without pain and to encourage a flexibility of the mind. Politicians should read science fiction, not westerns and detective stories.

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