Mama Corleone was "sought of" a practicing Catholic,well in the novel at least.She would go to church quite regularly and pray for "Vito's soul" and she eventually convinced Kay to start doing it.In part three,it shows Michael becoming more "God fearing",well at least a tiny bit. ;\)

The hero and the coward both feel the same thing, but the hero uses his fear, projects it onto his opponent, while the coward runs. It's the same thing, fear, but it's what you do with it that matters. Cus D'Amato