When the first person was made, a shadow was made with them, and the shadow was told: you will follow. Go where they go. Take the shape they take. Learn everything about them that can be learned from proximity.
The shadow did this for many years.
What the shadow learned was this: a person does not only move toward things. A person also refuses. They refuse slowness and they refuse looking back and they refuse the pause before the door, the hesitation before the room, the moment when the body knows something the mind has not yet decided. All of this the person discarded. All of this the shadow kept.
The shadow has no face. It does not need one. It knows exactly what you look like.
Over time, the shadow became its own being. Not through rebellion. Not through neglect. It became its own being through accumulation: every refusal the person made became a small addition to the shadow's nature. The shadow learned to linger in the places the person left too quickly. It learned the feeling of a threshold. It learned what it was to look back at a room, to notice what was there, to consider whether something was being left.
People began to say: the shadow knows something. They meant it as a figure of speech.
In the old stories, there is a version where the shadow finally walks on its own. It stands in the doorway. The person is already gone, already in the street, already not looking back. The shadow stays for a moment in the frame of the door, in the shape of a person standing very still, looking into the room they are leaving.
Then it goes.