The beauty of religious mania is that it has the power to explain everything. Once God (or Satan) is accepted as the first cause of everything which happens in the mortal world, nothing is left to chance ... or change. Once such incantatory phrases as "we see now through a glass darkly" and "mysterious are the ways". He chooses His wonders to perform" are mastered, logic can be happily tossed out the window". Religious mania is one of the few infallible ways of responding to the world's vagaries, because it totally eliminates pure accident. To the true religious maniac, it's all on purpose.
Stephen King