Supernaturalism is like a rolodex full of blank cards.
What is supernaturalism? It's the full encompass of all things that people believe but are not true or not proven to be even plausible. That would include things like tarot cards, numerology, astrology, crystals, spells, ghosts, spirits, souls, and every deity that has been given a name in history.
What does plausible mean? I use it to mean a balance between the likelyhood of something being true and untrue. Or to judge what is more believable.
What is a rolodex? Well, it's an old way of keep people's phone numbers and other contact information. A person would place their information into a single slot, often alphabetized, and when a person needed to find a particular piece of information, they'd turn the rolodex until they found the person or information they were looking for. They look like this:
Not too convoluted so far, I hope.
Here's the meat of what I'm getting at. As we grow up from being children, we gradually add to our rolodex of information. Ghosts, astrology, god, are all answers to explain the various empty slots in the rolodex. The slots that have nothing in them are for the things you don't know.
As we gain information, we put it in there and it's no longer empty. A ghost story disappears, a god dies, and good fortune finds you regardless of the planets in alignment. As we learn more about a topic we're interested in, that contact information changes, over time, from what was originally placed there.
I think that it is a normal human behavior to fill the rolodex with information and to have the least amount of empty slots. I say least amount because it is not possible for a human to know everything there is to know about everything. Collectively we can come close but individually I just don't think a single human has the lifetime to learn everything. I'm happy with just filling my own rolodex with some rudimentary information, just enough to fill a blank spot.
Whether what I said is true or not, convoluted or not, it is simply a picture I tried to paint with words.