I can't really put it in one sentence because although on one hand Preacher is about faith and yes it is also about, I suppose, the search for God, the search for faith and the manipulation and the abuse committed by figures in whom I suppose people have faith.
“Stop a minute, right where you are. Relax your shoulders, shake your head and spine like a dog shaking off cold water. Tell that imperious voice in your head to be still.”