Wow! I'm new here.
This is as hotly debated a topic as I've ever seen. Consider me an "undecided swing voter".
If somebody here can prove to me that THERE IS A GOD or prove to me that THERE ISN'T A GOD I would be eternally grateful. I'm just a mortal who is looking for answers.
Eric, God proves that He exists in many ways. But doubt can always be cast. Think about it.
If God manifested himself in all of his glory, so that none could dispute that a being with amazing unexplainable powers existed. People could still say, it's an illusion. Or it's a plot by the Jews. Or Karl Rove did it. Or it's an ET but it's not our creator. People determined to doubt will always find a way. But God doesn't manifest Himself in all of His glory to man, because He prefers that we choose between good and evil.
I once read a 900 page book by Karl Jung titled "Does God exist?" And proof after proof was offered, but there was always a rebuttal that could cast doubt. 850 pages into it, the author concluded that "proof" was best acheived on a personal revelation between the individual and God. And while I agree that God proving Himself to you directly is the best proof, God left us a lot of evidence.
A couple of comments on personal revelation. God extends an invitation repeatedly to seek Him out. When the Jews asked for a sign, Jesus called them wicked for needing one, some He gave no sign to, but others He gave a huge sign, the sign of Jonah. But when Herod sought a miracle, Jesus was completely silent. There is a difference between seeking wisdom and knowledge and needing signs. Nevertheless, sometimes God does grant signs.
Next post evidence from prophecies and miracles.
As science does not deal in proof, and religious deals in unreliable forms of proof, probably you'll just have to continue making your life's decisions in the face of uncertain knowledge.