The subconscious mind is a powerful thing. It takes in all of the information from your senses. It also creates the dreams you dream. While your body rests, your subconscious can work against you. It creates an enemy within your mind that chases you, wants to kill you, wants to hurt you. It can even create the perfect lover, give you false memories within your dreams to convince you it is all real, and then tear it all away when you awake. It can also insult you, tell you hurtful and spiteful things with the mask of someone you know.