After reading her other work, most specifically Angels: Celestial Spirits in Art and Literature, I have realised that this is not a standard story but it is a refacing of one that is very old. It is the war of freewill against the tyrant. It is the story of the fall of Lucifer. If you can manage to absorb this concept, (Not as easy as it sounds, it goes against what most people are trained to from birth) it will change the way you see a great many things.