[171] [cap.47] And this injunction which the lawgiver laid down, is of necessity applicable to all wise men; for they have their sense of sight purified, their sense of hearing thoroughly [112] examined, and so on with all the rest of their outward senses. Accordingly, they have the faculty of speech free from all spot or stain, and their appetites which prompt them to indulge the passions in a state of due subjection to the law.