Earth, seen from space, looked as it had looked in color-stereo pictures, but he found that the real thing is as vastly more satisfying as a hamburge… - Robert A. Heinlein

History does not record anywhere at any time a religion that has any rational basis. Religion is a crutch for people not strong enough to stand up to the unknown without help. But, like dandruff, most people do have a religion and spend time and money on it and seem to derive considerable pleasure from fiddling with it.

What is a “concrete” word? It is a spell-symbol used to tag something you can point to and thereby agree on, e. g., “cat,” “sailboat,” “ice-skating”—agree with such certainty that when you say “sailboat’’ there is no chance whatever that I will think you mean a furry quadruped with retractile claws.
With the spell symbol “God” there is no way to achieve such agreement because there is nothing to point to.

Budget the luxuries first.