One way of thinking of any God (big G) that may exist is as the initial
energy source providing the "Something" that had to exist immediately before the
big bang in order that there not be creation
ex nihilo. By its very existence, this Something triggers the big bang and the initiation of the
laws of physics. However, as the universe cools following the big bang, the triggering Energy itself becomes diminished and
powerless due to the fact the once the
particles of the
universe are set in motion their every action and interaction is
predetermined, and they cannot be controlled by God, or by anything that exists within this universe.
Bizzarely enough, this is one way that the
Kaballah sometimes thinks of God: When he was at his full "volume" there was no room for any matter to exist, so he had to retract and diminish himself in the process of
creation.