...though now that I think about it, I can see the connection: you thought the world was one way when you were alive, and it turns out, from the vantage point of death, to have been different; you imagined certain deities to be fictional and thought you knew what afterlife would be like, and you turn out to have been wrong about that too.

I think those implications may be there in the last chapter, but I would have liked them to be more the novel and less the last-thought dressing. Maybe you should write it.