Can you prove that God does not exist?

I am a Roman Catholic and have been brought up that way married to a Disciples of Christ Protestant. We had a dual Priest ceremony in my wife's Church. I believe in my religion because I have not seen any proof that my beliefs are wrong. But it is interesting that unless you are an athiest everyone believes in some higher diety. Whether or not you are Christian, Jew, Muslim, Budhist, etc., each religion believes in a power greater than themselves.