Accordingly, to expound Isaiah xl.-lxvi. is really to write the religious history of Israel. A prophet whose vision includes both Abraham and Christ, whose subject is the whole meaning and promise of Israel, cannot be adequately interpreted within the limits of his own text or of his own time. Excursions are necessary both to the history that is behind him, and to the history that is still in front of him. This is the reason of the appearance in this volume of chapters whose titles seem at first beyond its scope--such as From Isaiah to the Fall of Jerusalem: What Israel took into Exile: One God, One People: The Servant of the Lord in the New Testament. Moreover, much of this historical matter has an interest that is only historical. If in Isaiah's own prophecies it is his generation's likeness to ourselves, which appeals to our conscience, in chs. xl.-lxvi. of the Book called by his name it is Israel's unique meaning and office for God in the world, which we have to study. We are called to follow an experience and a discipline unshared by any other generation of men; and to interest ourselves in matters that then happened once for all, such as the victory of the One God over the idols, or His choice of a single people through whom to reveal Himself to the world. We are called to watch work, which that representative and priestly people did for humanity, rather than, as in Isaiah's own prophecies, work which has to be repeated by each new generation in its turn, and to-day also by ourselves. This is the reason why in an exposition of Isaiah xl.-lxvi., like the present volume, there should be a good deal more of historical recital, and a good deal less of practical application, than in the exposition of Isaiah i.-xxxix. At the same time we must not suppose that there is not very much in Isaiah xl.-lxvi. with which to stir our own consciences and instruct our own lives. For, to mention no more, there is that sense of sin with which Israel entered exile, and which has made the literature of Israel's Exile the confessional of the world; there is that great unexhausted programme of the Service of God and Man, which our prophet lays down as Israel's duty and example to humanity; and there is that prophecy of the virtue and glory of vicarious suffering for sin, which is the gospel of Jesus Christ and His Cross.