There are Demons, they do exist, just how darkness exist. If your greatest fear is demons, then your greatest strength is you.

Your true soul, is your Guardian Angel, in who you can become one with.

Your Demon is the lower part of you, and to able to rise we must merge ourselves with him, by lifting him to your lower parts of your chakras, where the purification begins. You are your Demons Angel, as how your Higher you, is your Angel.