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.

It will be possible in a few more years to build radio controlled rockets which can be steered into such orbits beyond the limits of the atmosphere and left to broadcast scientific information back to the Earth. A little later, manned rockets will be able to make similar flights with sufficient excess power to break the orbit and return to Earth. (1945) [Predicting communications satellites.]

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 creation of wealth is certainly not to be despised, but in the long run the only human activities really worthwhile are the search for knowledge, and the creation of beauty. This is beyond argument, the only point of debate is which comes first.

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

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