"[t]his notion leads to one of hard sf’s paradoxes: If our faith in science replaces religious faith, science is co-opted into becoming a religion, which, of course, would be unscientific. . . . The primacy of the sense of wonder in science fiction poses a direct challenge to religion: Does the wonder of science and the natural world as experienced through science fiction replace religious awe? . . . The idea that in the future better and more scientific things will replace all the things we currently need and use—a cosmic belief in an ever-improving standard of living—constitutes what I call the replacement principle of sf."