The parts of each small organism undergo changes and sympathetic affections which are not much felt, because these parts are not individual organisms (and they exist only for some time, and in some kinds of organisms). But in the universal organism, where the parts are separated by so great distances, where each one follows its own inclinations, where there is a multitude of different animals, the movements and change of place must be more considerable. Thus the sun, the moon and the other stars are seen successively to occupy different places, and to revolve regularly. It is not unreasonable therefore to suppose that souls would change location, as they change character, and that they would dwell in a place suitable to their dispositions. They would thus contribute to the order of the universe by occupying some, a place analogous to the head in the human body; and others, a place analogous to the human feet; for the universe admits of place for all degrees of perfection. When a soul does not choose the best (actions), and yet does not attach herself to what is worst, she would naturally pass into some other place, which is indeed pure, but yet proportioned to the mediocrity she has chosen. As to the punishments, they resemble the remedies applied by physicians to sickly organs. On some the physician lays certain substances; in some he makes incisions, or he changes the condition of some others, to reestablish the health of the whole system, by giving to each organ the special treatment suitable to it. Likewise, the health of the universe demands that the one (soul) be changed; that another be taken away from the locality where she languishes, and be located where she would recover from the disease. FOURTH ENNEAD, BOOK FIVE. Psychological Questions--III. About the Process of Vision and Hearing. IT IS UNCERTAIN WHETHER AN INTERMEDIARY BODY BE IMPLIED BY VISION.