Jesaja 9:18

Strophe 3. "For the wickedness burneth up like fire: it devours thorns and thistles, and burns in the thickets of the wood; and they smoke upwards in a lofty volume of smoke. Through the wrath of Jehovah of hosts the land is turned into coal, and the nation has become like the food of fire: not one spares his brother. They hew on the right, and are hungry; and devour on the left, and are not satisfied: they devour the flesh of their own arm: Manasseh, Ephraim; and Ephraim, Manasseh: these together over Judah. With all this His anger is not turned away, and His hand is stretched out still." The standpoint of the prophet is at the extreme end of the course of judgment, and from that he looks back. Consequently this link of the chain is also past in his view, and hence the future conversives. The curse, which the apostasy of Israel carries within itself, now breaks fully out. Wickedness, i.e., the constant thirst of evil, is a fire which a man kindles in himself. And when the grace of God, which damps and restrains this fire, is all over, it is sure to burst forth: the wickedness bursts forth like fire (the verb is used here, as in Isa 30:27, with reference to the wrath of God). And this is the case with the wickedness of Israel, which now consumes first of all thorns and thistles, i.e., individual sinners who are the most ripe for judgment, upon whom the judgment commences, and then the thicket of the wood (sib-che, (Note: The metheg (gaya) in סבכי (to be pronounced sib-che) has simply the caphonic effect of securing a distinct enunciation to the sibilant letter (in other instances to the guttural, vid., ‛arboth, Num 31:12), in cases where the second syllable of the word commences with a guttural or labial letter, or with an aspirate.) as in Isa 10:34, from sebac, Gen 22:…

The prophet in this chapter (according to the directions given him, Isa 3:10, Isa 3:11) saith to the righteous, It shall be well with thee, but Woe to the wicked, it shall be ill with him. Here are, I. Gracious promises to those that adhere to the law and to the testimony; while those that seek to familiar spirits shall be driven into darkness and dimness, they shall see a great light, relief in the midst of their distresses, typical of gospel grace. I. In the doctrine of the Messiah (Isa 9:1-3). 2. His victories (Isa 9:4, Isa 9:5). 3. His government and dominion as Immanuel (Isa 9:6, Isa 9:7). II. Dreadful threatenings against the people of Israel, who had revolted from and were enemies to the house of David, that they should be brought to utter ruin, that their pride should bring them down (Isa 9:8-10), that their neighbours should make a prey of them (Isa 9:11, Isa 9:12), that, for their impenitence and hypocrisy, all their ornaments and supports should be cut off (Isa 9:13-17), and that by the wrath of God against them, and their wrath one against another, they should be brought to utter ruin (Isa 9:18-21). And this is typical of the final destruction of all the enemies of the Son of David and his kingdom.

9:18-21 Following the decimation of leadership, civil war would destroy the nation like an out-of-control brushfire.