"My personality changed, I started to believe I was a prophet, someone special with a work to do. I developed extraordinary powers and was able to go days on end without food, drink or sleep."
Sounds like he was turning into one of the anointed.
I must admit I was put off from going to see the Exorcist for years. Partly because of Dub propoganda and partly because of urban myth marketing. When I finally got round to seeing it I wondered what all the fuss was about. The posessed girl's rotating head was comical. "The power of Christ compels you."
Clam