Of course there is a God. We all basically know there is.

I know no such thing.

Of course you do. When you think to yourself, and most of our waking life is taken up thinking to ourselves, you must have that feeling that your thoughts aren't entirely wasted, that in some sense they are being heard. Rationally, they aren't. You're entirely alone. Even the people to whom we are closest can have no real idea of what is going on in our minds. We aren't devastated by loneliness because, at a hardly conscious level, we don't accept that we're entirely alone. I think this sensation of being silently listened to with total comprehension... something you never find in real life... represents our innate belief in a supreme being, some all-comprehending intelligence.