I think referring to Scripture to prove God's existence is a little pointless. It's circular reasoning.
So as to incur slightly less wrath, I will say now for the record that I believe in God. I also "believe in Jesus" as some of you folks like to put it, but it is important to make the simple distinction between Jesus' having existed and his being divine. You would have to be extremely ignorant not to believe Jesus existed. No historical text of any merit will deny this fact, nor that he was a significant figure. As to his being the Son of God, of course this is debatable.
Since citing Scripture (of whatever faith) that says God exists is a fallacy (God exists because the Bible says He exists, and God says in the Bible that the Bible is fact), it is more helpful--and quite interesting--to read rhetoric by people who attempt to prove this is the case. I highly recommend Socrates/Plato/Aristotle, who, though existing before Christ, all help firm opinions on the immortatity/divinity of the human soul (take a look at The Divided Line). Rene Descartes also had much to say about the existence of God and how humans can know he exists (try Discourse on Method and Meditations on First Philosophy).
The interesting thing about these men is that they attempt to convince you of God's existence through tried and true methods of logic. Descartes' exclusive use of deductive reasoning makes a compelling and convincing argument. The best part is that via Descartes, you can see that athiests are proof of God's existence, because even they must have had a thought of God in order to deny that He exists.