Gods are ways we make sense of concepts. For example, we can make (partial) sense of the formation of the Universe if we treat it as a Creation. We look for a narrative and we can create narratives better with characters.Me too, for both.
I agree that joey has it right about what Satan represents, and that Xians were often taught that (and Satan is the personification of joey's list).
Xianity is much like the culture it came from: It took the personification of Gods from the Greeks, and the legal/social aspects from the Jews, and the personal relationship from the mystery religions.
It seems obvious that Satan is no more than a god - in the purely rational sense (the embodiment and anthropomorphization of abstract concepts)
It is why much of our scientific language is imbued with allusions to things acting with a purpose (especially in the theory of evolution).
This is why it is so hard, IMO, for theists (and myself when I was a theist) to look at the cause of the universe as a cold, unthinking event. We want a narrative and when we tell the story, we try to make it more interesting by adding drama. "The early hot, dense phase is itself referred to as "the Big Bang",[notes 2] and is considered the "birth" of our Universe.")
From wiki: notice they use "birth". Obviously i could find more poetic descriptions, but I wanted to find a dry description of the BB and show that the anthropomorphization was still an important part of telling the story.
So, we use Gods to insert into the story a bunch of unknowns, except we get to talk about them as known because we make our gods similar to us: they must have had a reason to do what they did, but like a dog can't understand why we write a check for a charity, we can't understand why "god" does what "he" does.
So, when a Creationist says "God is the Creator of the Universe", what he is really saying is, "I don't know what happened or how, but in my narrative, I make it a Being who did it out of Love and Loneliness. It's a gap-filler, but it will always work because I only need to personify the unknown parts."
I know this could be fleshed out better, but any comments?