As a small boy, whenever I saw myself reflected in a large mirror, I felt all the horror of the wraith-like doubling or multiplication of reality. Mirrors, with their never-failing mimicry, their pursuit of each of my movements, their pantomime of the world, seemed eerie to me. If a mirror hangs in a room, I can no longer be alone there: someone else is present. God created the forms of the mirror to show man that he is but a reflection, that all is vanity; this is why mirrors frighten us.
— Borges
Notes from a Room 