Some people need hope in their life to survive, to keep going. That hope is God. Believing in a God offers protection, hope, and peace of the mind.
I'm an Agnostic, so I can't just shoo away the thought of God existing. I also can't openly accept this belief, because it doesn't sound very believing, or acceptable. I don't know whether God exists, or not. But I do know is that the Bible's version of God is a jealous, masochistic and a wrath delivering being that isn't fond of forgiveness, nor forgetfulness.
Basically, there are many versions of God. They must of all came from something. A solid source.