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

Our own grandchildren may demonstrate that-sometimes- Gigantic is Beautiful.

Any path to knowledge is a path to God-or Reality, whichever word one prefers to use

Attempting to define science fiction is an undertaking almost as difficult, though not so popular, as trying to define pornography... In both pornography and SF, the problem lies in knowing exactly where to draw the line.

Isaac Asimov is, in reality, based on something I had invented a few years previously.

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.]

Space can be mapped and crossed and occupied without definable limit; but it can never be conquered.