We are, therefore, justified in coming to the provisional conclusion, that Second Isaiah is not a unity, in so far as it consists of a number of pieces by different men, whom God raised up at various times before, during, and after the Exile, to comfort and exhort amid the shifting circumstance and tempers of His people; but that it is a unity, in so far as these pieces have been gathered together by an editor very soon after the Return from the Exile, in an order as regular both in point of time and subject as the somewhat mixed material would permit. It is in this sense that throughout this volume we shall talk of "our prophet," or "the prophet;" up to ch. xlix., at least, we shall feel that the expression is literally true; after that it is rather an editorial than an original unity which is apparent. In this question of unity the dramatic style of the prophecy forms, no doubt, the greatest difficulty. Who shall dare to determine of the many soliloquies, apostrophes, lyrics and other pieces that are here gathered, often in want of any connection save that of dramatic grouping and a certain sympathy of temper, whether they are by the same author or have been collected from several origins? We must be content to leave the matter uncertain. One great reason, which we have not yet quoted, for supposing that the whole prophecy is not by one man, is that if it had been his name would certainly have come down with it. Do not let it be thought that such a conclusion, as we have been led to, is merely a dogma of modern criticism. Here, if anywhere, the critic is but the patient student of Scripture, searching for the testimony of the sacred text about itself, and formulating that. If it be found that such a testimony conflicts with ecclesiastical tradition, however ancient and universal, so much the worse for tradition. In Protestant circles, at least, we have no choice. _Litera Scripta manet_. When we know that the only evidence for the Isaian authorship of chs. xl.-lxvi. is tradition, supported by an unthinking interpretation of New Testament citations, while the whole testimony of these Scriptures themselves denies them to be Isaiah's, we cannot help making our choice, and accepting the testimony of Scripture. Do we find them any the less wonderful or Divine? Do they comfort less? Do they speak with less power to the conscience? Do they testify with more uncertain voice to our Lord and Saviour? It will be the task of the following pages to show that, interpreted in connection with the history out of which they themselves say that God's Spirit drew them, these twenty-seven chapters become only more prophetic of Christ, and more comforting and instructive to men, than they were before.