I'm fully tuned in to your work...!
If you look at William Friedkin's The Exorcist for instance? Forget about all the scary stuff, It's just the story of a Priest battling with his own faith in god & himself!
The taunts from the Linda Blair "possessed" character are of a rather personal nature (even cunningly stooping so low as to question the priests dead mothers "afterlife" existence.)
He strengthens his resolve & over powers the "demon" thus saving the girl...
Your average exorcism takes a long time...
You got to fully bleed the system....
