It's a little difficult that isn't it? Tolkien's vision is fabulous and so one wants to respect it, but he's also very Christian and Catholic and I'm absolutely not either, so inevitably tend to interpret things differently. Plus! A double-deity, what's not to like?!

I take a bit of comfort from 'Tree and Leaf' where he more or less admits that his picture has got so big that he can't see it all and doesn't really know where it has come from - I think he talks about the expanding mythology idea in several places, but Tree and Leaf is the one I tend to remember.