[16] On this account, in the law concerning leprosy, it is expressly ordered, "when in any house hollows appear of a pale or fiery red colour, that the inhabitants shall take out the stones in which such hollows appear, and put in other stones in their places;" [17] that is to say, when different destructive qualities which the pleasures and the appetites, and the passions akin to them, have wrought in men, weighing down and oppressing the whole soul, have made it more hollow and more lowly than its natural condition would be, it is well to remove the reasons which are the cause of this weakness, and to bring in such in their stead as are sound by a legitimate style of education and a healthy kind of discipline.