Released in the last year of the twentieth century, The Ninth Gate is a film about the use of a book to conjure up Satan. The book's title is The Nine Gates of the Kingdom of Shadows. Between three copies exist nine engravings appropriated from a book written by Lucifer. The person who gets all of those engravings can conjure up the devil. The Kingdom of Shadows presumably refers to Satan's kingdom. At the end of the film, Dean Corvo, a dishonest book dealer, rather than his client, Boris Balkan, is welcomed into a castle in which Satan is located. As the castle's main doors open, a blinding light shines outward into the night. Although Thomas Hobbes castigates the Roman Catholic Church as the kingdom of darkness in his text, Leviathan, Satan's realm has typically been depicted as dark in Christian art. Indeed, the film's own reference to Lucifer's kingdom as that of shadows follows this motif. Yet how can we account for the white light inside the castle?
The full essay is at "Satan in Film."