Of the Prophecies of the Birth and Achievements of Christ
Moreover, this our interpretation will be supported while (we find that) elsewhere as well the Scriptures designate Christ a warrior, as we gather from the names of certain weapons, and words of that kind. But by a comparison of the remaining senses the Jews shall be convicted. “Gird you,” says David, “the sword upon the thigh.” But what do you read above concerning the Christ? “Blooming in beauty above the sons of men; grace is outpoured in your lips.” But very absurd it is if he was complimenting on the bloom of his beauty and the grace of his lips, one whom he was girding for war with a sword; of whom he proceeds subjunctively to say, “Outstretch and prosper, advance and reign!” And he has added, “because of your lenity and justice.” Who will ply the sword without practising the contraries to lenity and justice; that is, guile, and asperity, and injustice, proper (of course) to the business of battles? See we, then, whether that which has another action be not another sword—that is, the Divine word of God, doubly sharpened with the two Testaments of the ancient law and the new law; sharpened by the equity of its own wisdom; rendering to each one according to his own action. Lawful, then, it was for the Christ of God to be precinct, in the Psalms, without warlike achievements, with the figurative sword of the word of God; to which sword is congruous the predicated “bloom,” together with the “grace of the lips;” with which sword He was then “girt upon the thigh,” in the eye of David, when He was announced as about to come to earth in obedience to God the Father's decree. “The greatness of your right hand,” he says, “shall conduct you” — the virtue to wit, of the spiritual grace from which the recognition of Christ is deduced. “Your arrows,” he says, “are sharp,” — God's everywhere-flying precepts (arrows) threatening the exposure of every heart, and carrying compunction and transfixion to each conscience: “peoples shall fall beneath you,” — of course, in adoration. Thus mighty in war and weapon-bearing is Christ; thus will He “receive the spoils,” not of “Samaria” alone, but of all nations as well. Acknowledge that His “spoils” are figurative whose weapons you have learned to be allegorical. And thus, so far, the Christ who has come was not a warrior, because He was not predicted as such by Isaiah.
“But if the Christ,” say they, “who is believed to be coming is not called Jesus, why is he who has come called Jesus Christ?” Well, each name will meet in the Christ of God, in whom is found likewise the appellation Jesus. Learn the habitual character of your error. In the course of the appointing of a successor to Moses, Oshea the son of Nun is certainly transferred from his pristine name, and begins to be called Jesus. Certainly, you say. This we first assert to have been a figure of the future. For, because Jesus Christ was to introduce the second people (which is composed of us nations, lingering deserted in the world aforetime) into the land of promise, “flowing with milk and honey” (that is, into the possession of eternal life, than which nought is sweeter); and this had to come about, not through Moses (that is, not through the Law's discipline), but through Joshua (that is, through the new law's grace), after our circumcision with “a knife of rock” (that is, with Christ's precepts, for Christ is in many ways and figures predicted as a rock); therefore the man who was being prepared to act as images of this sacrament was inaugurated under the figure of the Lord's name, even so as to be named Jesus. For He who ever spoke to Moses was the Son of God Himself; who, too, was always seen. For God the Father none ever saw, and lived. And accordingly it is agreed that the Son of God Himself spoke to Moses, and said to the people, “Behold, I send mine angel before your”— that is, the people's— “face, to guard you on the march, and to introduce you into the land which I have prepared you: attend to him, and be not disobedient to him; for he has not escaped your notice, since my name is upon him.” For Joshua was to introduce the people into the land of promise, not Moses. Now He called him an “angel,” on account of the magnitude of the mighty deeds which he was to achieve (which mighty deeds Joshua the son of Nun did, and you yourselves read), and on account of his office of prophet announcing (to wit) the divine will; just as withal the Spirit, speaking in the person of the Father, calls the forerunner of Christ, John, a future “angel,” through the prophet: “Behold, I send mine angel before Your”— that is, Christ's— “face, who shall prepare Your way before You.” Nor is it a novel practice to the Holy Spirit to call those “angels” whom God has appointed as ministers of His power. For the same John is called not merely an “angel” of Christ, but withal a “lamp” shining before Christ: for David predicts, “I have prepared the lamp for my Christ;” and him Christ Himself, coming “to fulfil the prophets,” called so to the Jews. “He was,” He says, “the burning and shining lamp;” as being he who not merely “prepared His ways in the desert,” but withal, by pointing out “the Lamb of God,” illumined the minds of men by his heralding, so that they understood Him to be that Lamb whom Moses was wont to announce as destined to suffer. Thus, too, (was the son of Nun called) Joshua, on account of the future mystery of his name: for that name (He who spoke with Moses) confirmed as His own which Himself had conferred on him, because He had bidden him thenceforth be called, not “angel” nor “Oshea,” but “Joshua.” Thus, therefore, each name is appropriate to the Christ of God— that He should be called Jesus as well (as Christ).
And that the virgin of whom it behooved Christ to be born (as we have above mentioned) must derive her lineage of the seed of David, the prophet in subsequent passages evidently asserts. “And there shall be born,” he says, “a rod from the root of Jesse”— which rod is Mary— “and a flower shall ascend from his root: and there shall rest upon him the Spirit of God, the spirit of wisdom and understanding, the spirit of discernment and piety, the spirit of counsel and truth; the spirit of God's fear shall fill Him.” For to none of men was the universal aggregation of spiritual credentials appropriate, except to Christ; paralleled as He is to a “flower” by reason of glory, by reason of grace; but accounted “of the root of Jesse,” whence His origin is to be deduced,— to wit, through Mary. For He was from the native soil of Bethlehem, and from the house of David; as, among the Romans, Mary is described in the census, of whom is born Christ.
Source: An Answer to the Jews (New Advent)