I think you are onto something about only getting the highlights of info not the full tones.

Re: Trinity/Devil, I know the Devil is not part of the Trinity. ;) The point was that even starting from what could be a nice tripartite way of thinking, Xianity seems to fallback upon God/Devil as the primary polar dynamic of prinicipality. A triune deity doesn't quite engender the fullness of the number three in this sense - but winds up just being caught in the same old Good/Evil binary opposition conceptually speaking.