To prove God is to destroy the idea of faith, which, in turn, makes religion meaningless.
Why do I believe in God?
1. Certain aspects of evolution require, in my opinion, more faith that they are simply a statistical probability than that some higher power has guided them.
2. I have seen God work in others' lives. I have seen change in a person that one might be inclined to describe as miraculous. I have heard and read testimonies. These lead me to believe that there is one true God, the God of Christianity.
3. I have no reason not to believe. There is nothing that has challenged my beliefs enough to warrant my relinquishing of my faith.