Also there maybe things going on in your personal life that open up door ways for demons to come in. Example, I had a un repented desire to lust. I got attack one night in my sleep by a succubus demon because I had a open door. Also if your sinning and not repenting you can open up doors for demons to attack your life, health, or household. These attacks can show up as arguments, depression, anxiety, sadness, temptation, bad thought, ect. This is not taught in church.