divine logic

I thought I`d been asking if God really existed since I was a grade school student.
There`re hindrances that made me to disbelieve Him. First, His being omnipresent: second, His being almighty. These two attributes of Him sounded illogical and irrational to me. That was why I suddenly jumped into conclusions condemning Him as a fact.
But there's some logic that sparked inside my head that said that these attributes were, after all, possible.
Let us start discussing His eternal being. In astrophysics, the subject I've been devoted to, eternity was one of the answers of cosmological origin. It tells it`s wrong to ask where nor how everything started as a being. The theory was called Steady State Theory.It says that everything in the universe is eternal. Meaning, it didn't have or undergone transition from nothing to sudden existence or being. Without neither a beginning nor end.
Second, His being almighty. If God was an eternal being, He must had an eternal mind. Compared to humans, we had limited ability because the body called brain was trapped inside the shell called skull giving the brain limited space. Also, our brain wasn`t eternal. It experienced wear & tear as we grew older; impairing it's ability to think wider. Also, because our brain wasn't eternal in time & in space, it`s hard to accept the thought of eternal being.
Another conclusion after I had read a copy of metaphysics & after some thought experiment on my own: a body must not cover up space, w/c was limited, to extend it's whole being including mind into eternity.
Yet, I was not done w/ it. I could say that God was really there. Just outside the known world& could be watching us now. But it didn`t mean that I was going to believe what Bible said about Him. There`s still the thought of mine that it couldn`t be trusted because it was still written by man.