We constantly witness the battle between good and bad, darkness and light, chaos and order, war and peace, hero and villain. Regardless of our religion or nationality, we have been told the story of our constant companions: an angel sitting on our right shoulder and a demon on the left. The angel persuades us to do good and records our good deeds. The devil persuades us to do bad and keeps record of our bad deeds. The angel is a metaphor for our "superego" and the devil stands for "Id". They represent the constant battle between the conscience and the unconscious.