1) If the universe is self-caused, then the universe is 'God'. A strange god, but the cosmological proof does not attempt to prove the Christian God, merely that there exists at least one thing which is radically unlike anything else in existence. Further note: Any two natural objects can be compared and determined to be similar or dissimilar with respect to given criteria. But the 'first-cause' of the cosmological proof is not simply in a normal, run-of-the-mill relation of dissimilarity to every natural object, because we are absolutely incapable of understanding something which is self-caused as a natural object. It is similar to natural objects in that it exists, and in no other way*. (Think of the way "the set of all sets" can't actually be a set. It just doesn't make sense and leads to contradictions within set theory. If we were beings that somehow subsisted wholly in the set-theoretic universe, we could still posit the class of all sets, but it wouldn't make sense to think of it as we think of our everyday objects. We might call it metanatural or even supernatural. )
*Of course, natural objects can be similar to God. Just not the other way round.
