Solomon had said (Pro 22:15), The foolishness which is bound in the heart of a child may be driven out by the rod of correction, for then the mind is to be moulded, the vicious habits not having taken root; but here he shows that, if it be not done then, it will be next to impossible to do it afterwards; if the disease be inveterate, there is a danger of its being incurable. Can the Ethiopian change his skin? Observe, 1. Some are so bad that rough and severe methods must be used with them, after gentle means have been tried in vain; they must be brayed in a mortar. God will take this way with them by his judgments; the magistrates must take this way with them by the rigour of the law. Force must be used with those that will not be ruled by reason, and love, and their own interest. 2. Some are so incorrigibly bad that even those rough and severe methods do not answer the end, their foolishness will not depart from them, so fully are their hearts set in them to do evil; they are often under the rod and yet not humbled, in the furnace and yet not refined, but, like Ahaz, trespass yet more (Ch2 28:22); and what remains then but that they should be rejected as reprobate silver?

For riches are not for ever,.... A man cannot be assured of the continuance of them; they are uncertain things, here today and gone tomorrow: wherefore, though a man has a considerable share of them, yet should follow one calling or another; particularly husbandry is recommended, or keeping sheep and cattle, which are increasing; by which means his substance will be continued and augmented, which otherwise is not to be depended on, but in a diligent attendance to business;

and doth the crown endure to every generation? the royal crown, that is not to be depended upon; a king that wears a crown is not sure he shall always wear it, or that it shall be continued to his family one generation after another. And it is suggested, that it is not even beneath such persons to have a regard to their flocks and herds, and the increase of their riches in this way: the Chinese kings, many of them, formerly employed themselves in husbandry, and set examples of industry and diligence to their subjects (t); King Hezekiah provided himself possessions of flocks and herds in abundance, Ch2 32:28.

(t) Vid. Martin. Hist. Sinica, p. 92, 93, 326.

The obstinate wickedness of such is incurable by the heaviest inflictions.