is characteristic of the creaturely realm. With reference to God the Trinity, Augustine writes: It is for this reason, then, that the nature of the Trinity is called simple, because it has not anything that it can lose, and because it is not something different from what it has, in the way that a vessel is different from its liquid or a body from its colour or the air from its light or heat, or the mind from its wisdom. For none of these things is what it has: the vessel is not liquid; the body is