In a strange room you must empty yourself for sleep. And before you are emptied for sleep, what are you. And when you are emptied for sleep, you are not. And when you are filled with sleep, you never were.
Everyone carries a room about inside him. This fact can even be proved by means of the sense of hearing. If someone walks fast and one pricks up one's ears and listens, say in the night, when everything round about is quiet, one hears, for instance, the rattling of a mirror not quite firmly fastened to the wall.