" By and large, the kind of science fiction which makes tomorrow's headlines as near as this morning's coffee has enlarged popular awareness of the modern, miraculous world of science we live in. It has helped generations of young people feel at age with a changing world.

But fashions change, old loves return, and now that Sputniks clutter up the sky with new and unfamiliar moons, the readers of science fiction are willing to wait to read tomorrow's headlines. Once again, I think, there is a place, a wish, a need for the wonder and color of the world way out. The world beyond the stars. The world we won't live to see. That is why I wrote The Door Through Space. "

― Marion Zimmer Bradley , The Door Through Space