The first edition of the Christology, although the impression was unusually large, had been for years out of print. It was impossible that the work could appear a second time in its original form. The first volume of it--written twenty-five years ago--was a juvenile performance, to which the Author himself had become rather a stranger; and the succeeding volumes required references to, and comparisons with, a large number of publications which subsequently appeared. But for the remodelling and revising which these circumstances rendered necessary, the Author could not find leisure, because new tasks were ever and anon presenting themselves to him; and these he felt himself, as it were, involuntarily impelled to undertake. But now he is led to believe that he could no longer delay. A powerful inclination urges him to comment on the Gospel of St John; but he thinks that the right to gratify this inclination must first be purchased by him by answering a call which proceeds from the more immediate sphere of his vocation, and which he is the less at liberty to disregard, as manifold facts give indication that the Christology has not yet completed its course. The Author dislikes to return to regions which have been already visited by him. He prefers the opening up to himself of paths which are new. It cost him therefore, at first, no little struggle to devote himself for years to the work of mere revision and emendation; but very soon, even here, he learned the truth of the proverb: "If there be obedience in the heart, love will soon enter." The arrangement in the present edition differs from that which was adopted in the former. It bears a closer resemblance to that which has been followed in the Commentaries on the Psalms, Revelation, and the Song of Solomon. The work opens with a discussion and commentary on the particular Messianic prophecies, in their historical order and connection. The general investigations with which, in the first edition, the work commenced, are, in the present edition, to appear in the form [Pg 10]of comprehensive treatises, at the close. The latter have thus obtained a more solid foundation; while the objections which might be raised against this arrangement will have force only until the completion of the whole, which, if it please the Lord, will not be very long delayed. The reader will then, of course, be at liberty, before he enters upon the particular portions, to go over, cursorily in the meantime, the closing treatises,--the proper study of which will be appropriate, however, only after he has made himself acquainted with the particular portions of the main body of the work. The matter of the two sections of the first part has been entirely rewritten. That of the two last parts appears more as a revisal only,--so executed, however, that not a single line has been reprinted without a renewed and careful examination.