The very best horror serves this or similar purposes: grotesqueries or terrors as mirrors. The Exorcist and Legion made us face our fears of bad things happening to good people, of the looks of innocence masking evil, and of our inner sanctums, our homes, not being safe after we lock the doors at night.
Thanks, Mr. Blatty. Rest.
Fascinating idea in this dialogue from The Exorcist, between Father Karras and Father Merrin: the idea of needing to love ourselves to accept that we could be loved by God. Self-esteem as a spiritual act. Daring to believe we could be lovable, loved, set apart. That's a dangerous, risky, frightening act of love. It brings the idea of fierceness and bravery to both love and spirituality.