What do we do with the things we don’t understand?
If it seems mysterious and important enough, we have traditionally explained it through God and religion. There is lightning and thunder, so perhaps a thunder god is behind it. We die and don’t know what is after death, so create mythologies to fill in the gap. We live a life, but don’t quite know what it is for or how we fit into the larger whole, so we create religions to give us a sense of meaning.
And I see that every time I create a belief for myself, I do the same. I don’t know, am uncomfortable with that not-knowing for whatever reason, so create a belief to explain the mysterious and give me a sense of somewhere to stand, a viewpoint I can identify with.