Translated from the Latin of Rufinus
5 What are we to say, moreover, regarding those prophecies of Christ contained in the Psalms, especially the one with the superscription, “A song for the Beloved;” in which it is stated that “His tongue is the pen of a ready writer; fairer than the children of men;” that “grace is poured into His lips?” Now, the indication that grace has been poured upon His lips is this, that, after a short period had elapsed— for He taught only during a year and some months — the whole world, nevertheless, became filled with His doctrine, and with faith in His religion. There arose, then, “in His days righteous men, and abundance of peace,” abiding even to the end, which end is entitled “the taking away of the moon;” and “His dominion shall extend from sea to sea, and from the river to the ends of the earth.” There was a sign also given to the house of David. For a virgin conceived, and bare Emmanuel, which, when interpreted, signifies, “God with us: know it, O nations, and be overcome.” For we are conquered and overcome, who are of the Gentiles, and remain as a kind of spoils of His victory, who have subjected our necks to His grace. Even the place of His birth was predicted in the prophecies of Micah, who said, “And you, Bethlehem, land of Judah, art by no means small among the leaders of Judah: for out of you shall come forth a Leader, who shall rule My people Israel.” The weeks of years, also, which the prophet Daniel had predicted, extending to the leadership of Christ, have been fulfilled. Moreover, he is at hand, who in the book of Job is said to be about to destroy the huge beast, who also gave power to his own disciples to tread on serpents and scorpions, and on all the power of the enemy, without being injured by him. But if any one will consider the journeys of Christ's apostles throughout the different places, in which as His messengers they preached the Gospel, he will find that both what they ventured to undertake is beyond the power of man, and what they were enabled to accomplish is from God alone. If we consider how men, on hearing that a new doctrine was introduced by these, were able to receive them; or rather, when desiring often to destroy them, they were prevented by a divine power which was in them, we shall find that in this nothing was effected by human strength, but that the whole was the result of the divine power and providence—signs and wonders, manifest beyond all doubt, bearing testimony to their word and doctrine.
6. These points now being briefly established, viz., regarding the deity of Christ, and the fulfilment of all that was prophesied respecting Him, I think that this position also has been made good, viz., that the Scriptures themselves, which contained these predictions, were divinely inspired,— those, namely, which had either foretold His advent, or the power of His doctrine, or the bringing over of all nations (to His obedience). To which this remark must be added, that the divinity and inspiration both of the predictions of the prophets and of the law of Moses have been clearly revealed and confirmed, especially since the advent of Christ into the world. For before the fulfilment of those events which were predicted by them, they could not, although true and inspired by God, be shown to be so, because they were as yet unfulfilled. But the coming of Christ was a declaration that their statements were true and divinely inspired, although it was certainly doubtful before that whether there would be an accomplishment of those things which had been foretold.
If any one, moreover, consider the words of the prophets with all the zeal and reverence which they deserve, it is certain that, in the perusal and careful examination thus given them, he will feel his mind and senses touched by a divine breath, and will acknowledge that the words which he reads were no human utterances, but the language of God; and from his own emotions he will feel that these books were the composition of no human skill, nor of any mortal eloquence, but, so to speak, of a style that is divine. The splendour of Christ's advent, therefore, illuminating the law of Moses by the light of truth, has taken away that veil which had been placed over the letter (of the law), and has unsealed, for every one who believes upon Him, all the blessings which were concealed by the covering of the word.
Source: De Principiis (New Advent)