[Sethomas]

Are you talking about Aquinas' notion of the "unmoved mover"? That's all I know of as far as using such logic to prove God's existence.

And Kahl, the primacy of this universe over any others is irrelevant to the point that it constitutes a shitload of matter that must have come from something, and adding to that parallel universes of infinite quantities you have present more matter than for which a singular big bang could account. This prompts the observation that big bangs technically happen over and over again, but you have to keep in mind that there must have been a first bang that set everything off and established a precedent for all the following bangs.