I'm curious if you've ever read what C.S. Lewis had to say on that subject. I cannot wait until The Last Battle comes out, to see if people flame one of the "big" intellectual figures of the faith in modern times as a heretic...it will be a conversation that really needs to be had. (He addressed it in much clearer language in Mere Christianity, but in The Last Battle it appears allegorically with the character of Emeth.)