We have said this is one of the finest prophecies of Isaiah. His political foresight was admirable, when he alone of his countrymen predicted the visitation of Assyria upon Judah. But now, when all are convinced of it, how still more wonderful does he seem facing that novel disaster, with the whole world's force behind it, and declaring its limit. He has not the temptation, so strong in prophets of judgement, to be a mere disaster-monger, and leave judgement on the horizon unrelieved. Nor is he afraid, as other predicters of evil have been, of the monster he has summoned to the land. The secret of this is that from the first he predicted the Assyrian invasion, not out of any private malice nor merely by superior political foresight, but because he knew--and knew, as he tells us, by the inspiration of God's own Spirit--that God required such an instrument to punish the unrighteousness of Judah. If the enemy was summoned by God at the first, surely till the last the enemy shall be in God's hand.
To this enemy we are now to see Isaiah turn with the same message he has delivered to the men of Jerusalem.
ISAIAH x. 5-34 (ABOUT 721 B.C.).
In chap. xxviii. Isaiah, speaking in the year 725 when Salmanassar IV. was marching on Samaria, had explained to the politicians of Jerusalem how entirely the Assyrian host was in the hand of Jehovah for the punishment of Samaria and the punishment and purification of Judah. The invasion which in that year loomed so awful was not unbridled force of destruction, implying the utter annihilation of God's people, as Damascus, Arpad and Hamath had been annihilated. It was Jehovah's instrument for purifying His people, with its appointed term and its glorious intentions of fruitfulness and peace.
In the tenth chapter Isaiah turns with this truth to defy the Assyrian himself. It is four years later. Samaria has fallen. The judgement, which the prophet spoke upon the luxurious capital, has been fulfilled. All Ephraim is an Assyrian province. Judah stands for the first time face to face with Assyria. From Samaria to the borders of Judah is not quite two days' march, to the walls of Jerusalem a little over two. Now shall the Jews be able to put to the test their prophet's promise! What can possibly prevent Sargon from making Zion as Samaria, and carrying her people away in the track of the northern tribes to captivity?
There was a very fallacious human reason, and there was a very sound Divine one.
The fallacious human reason was the alliance which Ahaz had made with Assyria. In what state that alliance now was, does not clearly appear, but the most optimist of the Assyrian party at Jerusalem could not, after all that had happened, be feeling quite comfortable about it. The Assyrian was as unscrupulous as themselves. There was too much impetus in the rush of his northern floods to respect a tiny province like Judah, treaty or no treaty. Besides, Sargon had as good reason to suspect Jerusalem of intriguing with Egypt, as he had against Samaria or the Philistine cities; and the Assyrian kings had already shown their meaning of the covenant with Ahaz by stripping Judah of enormous tribute.
So Isaiah discounts in this prophecy Judah's treaty with Assyria. He speaks as if nothing was likely to prevent the Assyrian's immediate march upon Jerusalem. He puts into Sargon's mouth the intention of this, and makes him boast of the ease with which it can be accomplished (vv. 7-11). In the end of the prophecy he even describes the probable itinerary of the invader from the borders of Judah to his arrival on the heights, over against the Holy City (vv. 27 last clause to 32).[31]
[31] It will be noticed that in the above version a different reading is adopted from the meaningless clause at the end of verse 27 in the English version, out of which a proper heading for the subsequent itinerary has been obtained by Robertson Smith (_Journal of Philology_, 1884, p. 62).