3.3.1
The material for the wise and good man is his own ruling faculty and the body is the material for the physician and the aliptes (the man who oils persons); the land is the matter for the husbandman. The business of the wise and good man is to use appearances conformably to nature: and as it is the nature of every soul to assent to the truth, to dissent from the false, and to remain in suspense as to that which is uncertain; so it is its nature to be moved towards the desire of the good, and to aversion from the evil; and with respect to that which is neither good nor bad it feels indifferent. For as the money-changer (banker) is not allowed to reject Caesar's coin, nor the seller of herbs, but if you show the coin, whether he chooses or not, he must give up what is sold for the coin; so it is also in the matter of the soul. When the good appears, it immediately attracts to itself; the evil repels from itself. But the soul will never reject the manifest appearance of the good, any more than persons will reject Caesar's coin. On this principle depends every movement both of man and God.