"Man created God is his own image and likness", VoltaireYeah, I hear ya on that. It could be seen as plausible that man invented God to help understand things, I personally think man invented a lot of things about God (a God that really was, but was misunderstood) in order to help him understand things.
For example, man invented a lot of the religious trappings of a relationship with God. The key is to ditch the religion and get the relationship