If a book is good enough to inspire a movie...read the book. The movie is always a disappointment in comparison. (and it was the Bishop of Digne, not a “priest”)
I used to think that the book (of whatever story) would always outshine the movie until I saw the first scene of the Fellowship of the Ring and after reading the LOTR several times, I cried with joy at being able to see the Shire on the big screen. Perhaps you are better at visualizing things. I know that my sons and my husband are but I’m pretty much a left brained personal so a good visualization of something can only enhance the experience. I recently saw the Screwtape Letters performed by Max McLean. Wonderful. Put meat on the bones of the book.