The dialogue is one that makes for believable characters, and likeable characters. I know many have a hard time believing in demons, but they are real and many people, even who don't believe in them, have a personal story from their own lives which seems to indicate they are real, and if that is the case, what of God? I believe this story in its skeletal form is true. The movie does a good job in portraying that often people just don't want to believe what their own eyes and ears are telling them.