Nightmare Before Christmas

Tonight I bought the movie that has become my favorite: Tim Burton's The Nightmare Before Christmas. I love the music and the richness of the atmosphere, and recently I've come to love the theme of the movie.
The main character, Jack, is dealing with an emptiness in his life, and he goes through the same kind of search for meaning that a lot of real people deal with. During this, he stumbles upon Christmas Town, and becomes enamored with it. Jack says that he feels "the warmth that's coming from inside", and he has a hard time both understanding and explaining what he feels, but he at last decides that "just because [he] cannot see it doesn't mean [he] can't believe it."
The beginning of the movie makes it obvious that there is a message about spirituality, mostly because the words that Jack uses to describe his experience are so typical of phrases used by people, especially Christians, of their spiritual awakenings. I was never quite sure what the story was trying to say about spirituality, however, since Jack makes such a mess of things in his excitement. I think I have it figured out now.
The message is about not taking religion to the point of fanaticism: Despite his spiritual experience, Jack is still the same person as he always was. Rather than completely changing who he is, his new spiritual side becomes a motivation for him to be better at living his normal life. I think that's a good lesson. People don't change their personalities when they become converted; they grow and become better, but they don't become different people, and in the end the best application of their religion is in their daily lives, and not in fanatic replacements for their lives.