I home the day comes when people/humans can analyze thought itself. Something as basic as that and we really don't know how it comes about.

I don't know for sure that thoughts about G-d are any different than thoughts about the curvature of space or why the colour blue appeals to some folks and not others. I also don't know at what point an idea becomes a conviction or a conviction a belief. That process does occur, and we know it because there are people who die for their beliefs.