1. He shows the vanity of his insolent and audacious boasts (v. 15): Shall the axe boast itself against him that hews therewith? or shall the saw magnify itself against him that draws it? So absurd are the boasts of this proud man. "O what a dust do I make!" said the fly upon the cart-wheel in the fable. "What destruction do I make among the trees!" says the axe. Two ways the axe may be said to boast itself against him that hews with it:—(1.) By way of resistance and opposition. Sennacherib blasphemed God, insulted him, threatened to serve him as he had served the gods of the nations; now this was as if the axe should fly in the face of him that hews with it. The tool striving with the workman is no less absurd than the clay striving with the potter; and as it is a thing not to be justified that men should fight against God with the wit, and wealth, and power, which he gives them, so it is a thing not to be suffered. But if men will be thus proud and daring, and bid defiances to all that is just and sacred, let them expect that God will reckon with them; the more insolent they are the surer and sorer will their ruin be. (2.) By way of rivalship and competition. Shall the axe take to itself the praise of the work it is employed in? So senseless, so absurd was it for Sennacherib to say, By the strength of my hand I have done it, and by my wisdom, v. 13. It is as if the rod, when it is shaken, should boast that it guides the hand which shakes it; whereas, when the staff is lifted up, is it not wood still? so the last clause may be read. If it be an ensign of authority (as the nobles of the people carried staves, Num. xxi. 18), if it be an instrument of service, either to support a weak man or to correct a bad man, still it is wood, and can do nothing but as it is directed by him that uses it. The psalmist prays that God would make the nations to know that they were but men (Ps. ix. 20), the staff to know that it is but wood.