Slowly we see that sweet, doting grandmothers are actually coven leaders looking for a young woman to bear the devil's child and bring on the Age of Antichrist. The only thing resisting the diabolical plan is Mia Farrow's terror, and that's not much of a barrier to Beelzebub in heat. God is nowhere to be seen. Religion is impotent or absent. Goodness is not well defined.
Evil is overwhelming and there is no stopping it.
Finally Mia is resigned to the triumph of evil. It's hard to find. Here the opposition to overwhelming evil usually comes from panicky mundane people who finally get their dander up about the decapitations and slashings occurring all around them. In such films good seems harmless at best, while evil is far more captivating, as Weil warned. Freedom from the Gothic framework has been declared.