I want to say before I go any further that I am not trying to insult any religions here. I'm trying to put forth a scientific theory behind possible origins for the entity that we call "God."
While I'm not usually one to shy away from a good metaphysical discussion, let me try to throw this into the realms of the scientific here. If we accept that God has always existed, then he/she (depending on your faith) must exist outside the known dimension of time, correct? This would indicate that the entity that we call God should be able to walk through the temporal dimension much as we would walk through the three spatial dimensions, no?
I mean, it's been a while since I read
Flatland, but if we look at what's known, then could what we call God be an extradimensional being who once had an effect on our four dimensional world?