[Technotroll]

Your assumptions seems to be that there is a limit to what is knowable.

Picture a spotlight shining down on an infinite field.

The surface which is lit up by the spotlight represents our collective knowledge about reality, and the further up you move the spotlight, the more of the field you will light up, and thus know about.

Except, how much is it left to know about outside of circle that the spotlight lights up?

With that said, I think it's pointless to speak about God in the realm of science, because there is no way of scientifically proving that he's real or not. In the realm of science, we have to abide by the rules thus set, and how we define what is knowable. The rules are quite good, and they have served us well thus far, so there is no need to question it's validity or usefulness outside of strictly philosophical limits. And under those rules, God is not knowable. Thus you may believe in God, the Universe or only in the things you can scientifically prove; it matters not, because you still exist and perceive. Hopefully!