" Hold! Go no further!” upset people cry out. “You are coming too near to the subject named ‘religion’!”
Yes, ‘Religion’ is one of the taboo words that modern science fictioneers may not think nor say, unless they use it to mean something else. The selective speculation which they are allowed will not stretch far enough to allow religion itself, not far enough to see that we have passed the Isthmus and have only to take off our handcuffs and blindfolds to be free. In this, the narrowness, Science Fiction stands where much science stood a hundred years ago and where almost all pseudo-science still stands today. "

― R.A. Lafferty , It's Down the Slippery Cellar Stairs (Essays on Fantastic Literature 1)