Maybe it's more about letting go of guilt and shame and just feeling free to be yourself and live life. I know that helps a lot. In fact, in my experience, the number one biggest defense against any type of negativity (whether you want to call it demonic or not) is releasing guilt, resentment, and regret. Forgive yourself, forgive others, and drop the chatter in your head that tells you you're bad, you're wrong, etc. Eject it like a bad tape and replace it with thoughts, feelings, and actions that make you feel good about yourself. The practice you mention, when done with self-love and good intentions, is a powerful way to do just that.