a demon rendered into language from space

Why is possession so frightening? I encounter a demon on the page. Just seeing the words arranged in a way that suggests evil, I become anxious. I am, in fact, ever so slightly afraid to keep reading. As though taking the works into me invite the demon, too (are the words the spirit? Is language the spirit or vibration?). I read on and there are two stories at work—that of the unseen and that of the physical world. The unseen are where the demons live, the physical is where the effects occur. What does a demon do in the unseen world when he is not possessing a body? One can only communicate a demon (the presence of) with language.