But besides the pedants in Israel, there is apparent through these prophecies another body of men, against whom also Jehovah claims the actual Cyrus for His own. They are the priests and worshippers of the heathen idols. It is well known that the advent of Cyrus cast the Gentile religions of the time and their counsellors into confusion. The wisest priests were perplexed; the oracles of Greece and Asia Minor either were dumb when consulted about the Persian, or gave more than usually ambiguous answers. Over against this perplexity and despair of the heathen religions, our prophet confidently claims Cyrus for Jehovah's own. In a debate in ch. xli., in which he seeks to establish Jehovah's righteousness--that is, Jehovah's faithfulness to His word, and power to carry out His predictions--the prophet speaks of ancient prophecies which have come from Jehovah, and points to Cyrus as their fulfilment. It does not matter to us in the meantime what those prophecies were. They may have been certain of Jeremiah's predictions; we may be sure that they cannot have contained anything so definite as Cyrus' name, or such a proof of Divine foresight must certainly have formed part of the prophet's plea. It is enough that they could be quoted; our business is rather with the evidence which the prophet offers of their fulfilment. That evidence is Cyrus. Would it have been possible to refer the heathen to Cyrus as proof that those ancient prophecies were being fulfilled, unless Cyrus had been visible to the heathen,--unless the heathen had been beginning already to feel this Persian "from the sunrise" in all his weight of war? It is no esoteric doctrine which the prophet is unfolding to initiated Israelites about Cyrus. He is making an appeal to men of the world to face facts. Could he possibly have made such an appeal unless the facts had been _there_, unless Cyrus had been within the ken of "the natural man"? Unless Cyrus and his conquests were already historically present, the argument in xli.-xlviii. is unintelligible.
If this evidence for the exilic date of Isa. xl.-xlviii.--for all these chapters hang together--required any additional support, it would find it in the fact that the prophet does not wholly treat of what is past and over, but makes some predictions as well. Cyrus is on the way of triumph, but Babylon has still to fall by his hand. Babylon has still to fall, before the exiles can go free. Now, if our prophet were predicting from the standpoint of one hundred and forty years before, why did he make this sharp distinction between two events which appeared so closely together? If he had both the advent of Cyrus and the fall of Babylon in his long perspective, why did he not use "the prophetic perfect" for both? That he speaks of the first as past and of the second as still to come, would most surely, if there had been no tradition the other way, have been accepted by all as sufficient evidence, that the advent of Cyrus was behind him and the fall of Babylon still in front of him, when he wrote these chapters.
Thus the earlier part, at least, of Isa. xl.-lxvi.--that is, chs. xl.-xlviii.--compels us to date it between 555, Cyrus' advent, and 538, Babylon's fall. But some think that we may still further narrow the limits. In ch. xli. 25, Cyrus, whose own kingdom lay east of Babylonia, is described as invading Babylonia from the north. This, it has been thought, must refer to his union with the Medes in 549, and his threatened descent upon Mesopotamia from their quarter of the prophet's horizon.[4] If it be so, the possible years of our prophecy are reduced to eleven, 549-538. But even if we take the wider and more certain limit, 555 to 538, we may well say that there are very few chapters in the whole of the Old Testament whose date can be fixed so precisely as the date of chs. xl.-xlviii.