. . . it is impossible to write science fiction and really ignore religion. What if we find intelligent beings on other worlds? Do they have a religion? Is our God universal, and is he/she.it their God as well? What do we do about it? What do they do about it? This point is almost never taken up but, since it would certainly arise if such beings were discovered in actual fact, science fiction loses touch with reality in taking the easy way out and pretending religion doesn’t exist.
Isaac Asimov, in Asimov’s Galaxy: Reflections on Science Fiction (1989).