Chesterton, in dealing with paganism and pantheism, makes this comment in passing:
Indeed it is only too easy to forget that there is a thrill in theism. A novel in which a number of separate characters all turned out to be the same character would certainly be a sensational novel. It is so with the idea that sun and tree and river and the disguises of one god and not of many.
-G.K. Chesterton, The Everlasting Man, p.98
Wow, a sensational novel where it turns out that several characters were the same one!
The most excellent example of this ever is The Westing Game, a wonderful young adult mystery.
Sorry for the spoiler. It’s still worth the read.