Mirrors represent the evil nature of an individual that can be found from within. Since the self can unintentionally become a source of evil.
The primary purpose of the mirror is to allow the user a brief realization into the nature of the self by seeing his or her reflection.
They are typically placed above doorways or entrances of a home but it can be much more effective at eye level.
Mirrors are reminders for the user to remain watchful by reflecting upon The Self.