This topic reminds me of something else from my distant past as an East Tennessee hillbilly. In that part of the country, the specialness came from "being called to preach." Men would have an out-of-the-ordinary experience of some kind and interpret that as having been "called."
My dad told us a story of his youth when he and some of his friends knew a neighbor would be visiting the graveyard. The boys took a tree limb and draped a white sheet over it. They hid, and one or two of them manipulated the sheet and made ghostly sounds. The neighbor man got so scared that he ran home and fainted. His wife said, "My Lord, it looks like Ollie's been called to preach!
My grandfather (a very religious man himself when I knew him, but with a sordid past as a moonshiner) was deriding this worldview one time. He lay on the floor, closed his eyes, and said, "I told the congregation I seen [sic] a bull with one horn, and I knowed [sic] I'd been called to preach."
I'll have to share some of my grandmother's stories of funny things people said in church some time.
The people of whom I speak were uneducated and knew almost nothing of the world outside their mountain enclave.