One of the central philosophical questions for which only Christianity, of all the world's religions, offers a viable answer is the problem of The One and The Many. There are various statements of this problem, but all of them involve the relation between essential oneness and essential diversity. In almost all philosophical systems, either the principle of The One takes precedence, or else the principle of The Many takes first priority. Not only does Christianity "solve" this problem (to the extent that we can sanely say that a Mystery is ever "solved"), but it solves it by understanding this issue as being at the center of the identity of God Himself. In the doctrine of the Trinity, there is diversity and differentiation (the Many) in the context of essential Oneness. So critical is this issue to the survival of the Christian faith, that tightly written statements have been formulated to protect either aspect (the One or the Many) from overshadowing the other....