If God exists, then all of creation is evidence of his existence, and it calls out to him by every move that it makes. Every single thing has energy, and is in motion, echoes left behind by God's spoken word that made the universe.
As far as proof goes, the only way I could ever "prove" God's existence to anyone was by just loving him or her. Not just loving them with my love either, but trying to give them the same love that I feel God gives me.
Then there are also the promises of God in the bible, which he never breaks. If a kept promise is proof, then I guess there is proof of his existence, but I am sure most would call it subjective.
™ Version 4.2
