Any darkness that comes out in my life is the fruit of my own appetites, and it's my choice either to feed or starve those appetites. I was purposely feeding on music and movies with dark, violent themes and plenty of sexual content. All of that takes root in our thought lives and affects everything we do. It clouds our communication with God and can limit how he uses us. If someone is in a dark place and needs help, we're probably not going to have suitable answers when we're gorging on trash.