Thom's Law
"Nothing can not produce something. If there was ever a time when there was nothing, there would STILL be nothing."

So even a God (which is something) could not be produced by nothing. Therefore, if a God came into being, he must have come out of something. The only "something" which exists now and has always existed is that of energy and/or matter.

So, any God (or anything else) must be, or must have been, the product of something. Everything which is, must be a product of energy and/or matter.