For what reason did God, deciding that the Savior should be born from a virgin, not choose a virgin who was not betrothed? Might it have been, then, an economy for her to conceive while having a betrothed, so that it might not appear as a disgrace upon her body for her to conceive? For it is rightly written in one of the letters of a certain martyr—I mean Ignatius, the second bishop of Antioch after the blessed Peter, who fought with beasts in Rome during the persecution—“and the virginity of Mary escaped the notice of the ruler of this age.” So, if it had not been for what seemed to be a marriage, it would not have escaped his notice, but the ruler of this age would have known that Mary, having never slept with a man, conceived, and thus the conception must be divine. The Savior wished through the entire economy to elude the devil, and indeed ordered the disciples not to make him manifest.
For the one and the same Spirit of God, who proclaimed by the prophets what and of what sort the advent of the Lord should be, did by these elders give a just interpretation of what had been truly prophesied; and He did Himself, by the apostles, announce that the fullness of the times of the adoption had arrived, that the kingdom of heaven had drawn near, and that He was dwelling within those that believe in Him who was born Emmanuel of the Virgin. To this effect they testify, [saying,] that before Joseph had come together with Mary, while she therefore remained in virginity, "she was found with child of the Holy Ghost;" [Matthew 1:18] and that the angel Gabriel said to her, "The Holy Ghost shall come upon you, and the power of the Highest shall overshadow you; therefore also that holy thing which shall be born of you shall be called the Son of God;" [Luke 1:35] and that the angel said to Joseph in a dream, "Now this was done, that it might be fulfilled which was spoken by Isaiah the prophet, Behold, a virgin shall be with child." [Matthew 1:23] But the elders have thus interpreted what Esaias said: "And the Lord, moreover, said to Ahaz, Ask for yourself a sign from the Lord your God out of the depth below, or from the height above. And Ahaz said, I will not ask, and I will not tempt the Lord. And he said, It is not a small thing for you to weary men; and how does the Lord weary them? Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son; and you shall call His name Emmanuel. Butter and honey shall He eat: before He knows or chooses out things that are evil, He shall exchange them for what is good; for before the child knows good or evil, He shall not consent to evil, that He may choose that which is good." [Isaiah 7:10-17] Carefully, then, has the Holy Ghost pointed out, by what has been said, His birth from a virgin, and His essence, that He is God (for the name Emmanuel indicates this). And He shows that He is a man, when He says, "Butter and honey shall He eat;" and in that He terms Him a child also, [in saying,] "before He knows good and evil;" for these are all the tokens of a human infant. But that He "will not consent to evil, that He may choose that which is good,"— this is proper to God; that by the fact, that He shall eat butter and honey, we should not understand that He is a mere man only, nor, on the other hand, from the name Emmanuel, should suspect Him to be God without flesh.
For what reason did God, deciding that the Savior should be born from a virgin, not choose a virgin who was not betrothed? Might it have been, then, an economy for her to conceive while having a betrothed, so that it might not appear as a disgrace upon her body for her to conceive? For it is rightly written in one of the letters of a certain martyr—I mean Ignatius, the second bishop of Antioch after the blessed Peter, who fought with beasts in Rome during the persecution—“and the virginity of Mary escaped the notice of the ruler of this age.” So, if it had not been for what seemed to be a marriage, it would not have escaped his notice, but the ruler of this age would have known that Mary, having never slept with a man, conceived, and thus the conception must be divine. The Savior wished through the entire economy to elude the devil, and indeed ordered the disciples not to make him manifest. But even when he was tempted by the devil, nowhere did he openly declare that he is the Son of God, but merely said: it is not necessary for me to worship you, it is not necessary for me to make stones into bread, it is not necessary for me to throw myself down from above. Also, the Apostle says that the economy of the passion was done in forgetfulness of the opposing power: “which none of the rulers of this age understood; for if they had, they would not have crucified the Lord of glory.” If it was not hidden from the demon—for it said: “We know who you are, the Son of God”—see, the lesser in evil knew the Savior, but the greater in evil was hindered by the magnitude of his wickedness from beholding him.
Now this refutes also the false interpretation which some have drawn from the words of Matthew, where he says, "Before they came together she was found to be with child." They interpret this as though the evangelist meant to say, "Later she came together with Joseph like any other wife and lay with him, but before this occurred she was with child apart from Joseph," etc. Again, when he says, "And Joseph knew her not until she brought forth her first-born son" [Matt. 1:25], they interpret it as though the evangelist meant to say that he knew her, but not before she had brought forth her first-born son. This was the view of Helvidius which was refuted by Jerome.
Such carnal interpretations miss the meaning and purpose of the evangelist. As we have said, the evangelist, like the prophet Isaiah, wishes to set before our eyes this mighty wonder, and point out what an unheard-of thing it is for a maiden to be with child before her husband brings her home and lies with her; and further, that he does not know her carnally until she first has a son, which she should have had after first having been known by him. Thus, the words of the evangelist do not refer to anything that occurred after the birth, but only to what took place before it. For the prophet and the evangelist, and St. Paul as well, do not treat of this virgin beyond the point where they have from her that fruit for whose sake she is a virgin and everything else. After the child is born they dismiss the mother and speak not about her, what became of her, but only about her offspring. Therefore, one cannot from these words [Matt. 1:18, 25] conclude that Mary, after the birth of Christ, became a wife in the usual sense; it is therefore neither to be asserted nor believed. All the words are merely indicative of the marvelous fact that she was with child and gave birth before she had lain with a man.
The form of expression used by Matthew is the common idiom, as if I were to say, "Pharaoh believed not Moses, until he was drowned in the Red Sea." Here it does not follow that Pharaoh believed later, after he had drowned; on the contrary, it means that he never did believe. Similarly when Matthew [1:25] says that Joseph did not know Mary carnally until she had brought forth her son, it does not follow that he knew her subsequently; on the contrary, it means that he never did know her. Again, the Red Sea overwhelmed Pharaoh before he got across. Here too it does not follow that Pharaoh got across later, after the Red Sea had overwhelmed him, but rather that he did not get across at all. In like manner, when Matthew [1:18] says, "She was found to be with child before they came together," it does not follow that Mary subsequently lay with Joseph, but rather that she did not lie with him.
Elsewhere in Scripture the same manner of speech is employed. Psalm 110 [:1] reads, "God says to my Lord: 'Sit at my right hand, till I make your enemies your footstool.'" Here it does not follow that Christ does not continue to sit there after his enemies are placed beneath his feet. Again, in Genesis 28 [:15], "I will not leave you until I have done all that of which I have spoken to you." Here God did not leave him after the fulfillment had taken place. Again, in Isaiah 42 [:4], "He shall not be sad, nor troublesome, till he has established justice in the earth." There are many more similar expression, so that this babble of Helvidius is without justification; in addition, he has neither noticed nor paid any attention to either Scripture or the common idiom.
There is an activity of God displayed throughout creation, a wholesale activity let us say which men refuse to recognize. The miracles done by God incarnate, living as a man in Palestine, perform the very same things as this wholesale activity, but at a different speed and on a smaller scale. One of their chief purposes is that men, having seen a thing done by personal power on the small scale, may recognize, when they see the same thing done on the large scale, that the power behind it is also personal – is indeed the very same person who lived among us two thousand years ago. The miracles in fact are a retelling in small letters of the very same story which is written across the whole world in letters too large for some of us to see...
I can understand the man who denies the miraculous altogether; but what is one to make of the people who admit some miracles but deny the Virgin Birth? Is it that for all their lip service to the laws of Nature there is only one law of Nature that they really believe? Or is it that they see in this miracle a slur upon sexual intercourse which is rapidly becoming the one thing venerated in a world without veneration? No miracle is in fact more significant. What happens in ordinary generation? What is a father’s function in the act of begetting? A microscopic particle of matter from his body fertilizes the female: and with that microscopic particle passes, it may be, the color of his hair and his great grandfather’s hanging lip, and the human form in all its complexity of bones, liver, sinews, heart, and limbs, and pre-human form which the embryo will recapitulate in the womb. Behind every spermatozoon lies the whole history of the universe: locked within it is no small part of the world’s future. That is God’s normal way of making a man – a process that takes centuries, beginning with the creation of matter itself, and narrowing to one second and one particle at the moment of begetting. And once again men will mistake the sense impressions which this creative act throws off for the act itself or else refer it to some infinite being such as Genius. Once, therefore, God does it directly, instantaneously; without a spermatozoon, without the millenniums of organic history behind the spermatozoon. There was of course another reason. This time He was creating not simply a man, but the man who was to be Himself: the only true Man. The process which leads to the spermatozoon has carried down with it through the centuries much undesirable silt; the life which reaches us by that normal route is tainted. To avoid that taint, to give humanity a fresh start, he once short-circuited the process. There is a vulgar anti-God paper which some anonymous donor sends me every week. In it recently I saw the taunt that we Christians believe in a God who committed adultery with the wife of a Jewish carpenter. The answer to that is that if you describe the action of God in fertilizing Mary as “adultery” then, in that sense, God would have committed adultery with every woman who ever had a baby. For what He did once without a human father, He does always even when He uses a human father as His instrument. For the human father in ordinary generation is only a carrier, sometimes an unwilling carrier, always the last in a long line of carriers, of life that comes from the supreme life. Thus the filth that our poor, muddled, sincere, resentful enemies fling at the Holy One, either does not stick, or, sticking, turns into glory.
And hear again how Isaiah in express words foretold that He should be born of a virgin; for he spoke thus: "Behold, a virgin shall conceive, and bring forth a son, and they shall say for His name, 'God with us.'" [Isaiah 7:14] For things which were incredible and seemed impossible with men, these God predicted by the Spirit of prophecy as about to come to pass, in order that, when they came to pass, there might be no unbelief, but faith, because of their prediction. But lest some, not understanding the prophecy now cited, should charge us with the very things we have been laying to the charge of the poets who say that Jupiter went in to women through lust, let us try to explain the words. This, then, "Behold, a virgin shall conceive," signifies that a virgin should conceive without intercourse. For if she had had intercourse with any one whatever, she was no longer a virgin; but the power of God having come upon the virgin, overshadowed her, and caused her while yet a virgin to conceive. And the angel of God who was sent to the same virgin at that time brought her good news, saying, "Behold, you shall conceive of the Holy Ghost, and shall bear a Son, and He shall be called the Son of the Highest, and you shall call His name Jesus; for He shall save His people from their sins," [Luke 1:32; Matthew 1:21] — as they who have recorded all that concerns our Saviour Jesus Christ have taught, whom we believed, since by Isaiah also, whom we have now adduced, the Spirit of prophecy declared that He should be born as we intimated before. It is wrong, therefore, to understand the Spirit and the power of God as anything else than the Word, who is also the first-born of God, as the foresaid prophet Moses declared; and it was this which, when it came upon the virgin and overshadowed her, caused her to conceive, not by intercourse, but by power. And the name Jesus in the Hebrew language means Σωτήρ (Saviour) in the Greek tongue. Wherefore, too, the angel said to the virgin, "You shall call His name Jesus, for He shall save His people from their sins." And that the prophets are inspired by no other than the Divine Word, even you, as I fancy, will grant.
Otherwise; the Angel seeing the depths of the Divine mercy, the laws of nature broken through and reconciliation made, He who was above all made lower than all; all these wonders, all this he comprises in that one saying, Now all this hath happened; as though he had said, Do not suppose that this is newly devised of God, it was determined of old. And he rightly cites the Prophet not to the Virgin, who as a maiden was untaught in such things, but to Joseph, as to one much versed in the Prophets. And at first he had spoken of Mary as thy wife, but now in the words of the Prophet he brings in the word "Virgin," that he might hear this from the Prophet, as a thing long before determined. Therefore to confirm what he had said, he introduces Isaiah, or rather God; for he does not say, Which was spoken by Isaiah, but, Which was spoken of the Lord by the Prophet.
As it is the manner of Scripture to convey a knowledge of events under the form of a name, so here, They shall call His name Emmanuel, means nothing else than, They shall see God among men. Whence he says not, 'Thou shalt call,' but, They shall call.
I hear many say, While we are here, and enjoying the privilege of hearing, we are awed, but when we are gone out, we become altered men again, and the flame of zeal is quenched. What then may be done, that this may not come to pass? Let us observe whence it arises. Whence then does so great a change in us arise? From the unbecoming employment of our time, and from the company of evil men. For we ought not as soon as we retire from the Communion, to plunge into business unsuited to the Communion, but as soon as ever we get home, to take our Bible into our hands, and call our wife and children to join us in putting together what we have heard, and then, not before, engage in the business of life.
For if after the bath you would not choose to hurry into the market place, lest by the business in the market you should destroy the refreshment thence derived; much more ought we to act on this principle after the Communion. But as it is, we do the contrary, and in this very way throw away all. For while the profitable effect of what has been said to us is not yet well fixed, the great force of the things that press upon us from without sweeps all entirely away.
That this then may not be the case, when you retire from the Communion, you must account nothing more necessary than that you should put together the things that have been said to you. Yes, for it were the utmost folly for us, while we give up five and even six days to the business of this life, not to bestow on things spiritual so much as one day, or rather not so much as a small part of one day. See ye not our own children, that whatever lessons are given them, those they study throughout the whole day? This then let us do likewise, since otherwise we shall derive no profit from coming here, drawing water daily into a vessel with holes, and not bestowing on the retaining of what we have heard even so much earnestness as we plainly show with respect to gold and silver. For any one who has received a few pence both puts them into a bag and sets a seal thereon; but we, having given us oracles more precious than either gold or costly stones, and receiving the treasures of the Spirit, do not put them away in the storehouses of our soul, but thoughtlessly and at random suffer them to escape from our minds. Who then will pity us after all this, plotting against our own interests, and casting ourselves into so deep poverty? Therefore, that this may not be so, let us write it down an unalterable law for ourselves, for our wives, and for our children, to give up this one day of the week entire to hearing, and to the recollection of the things we have heard. For thus with greater aptness for learning shall we approach what is next to be said; and to us the labor will be less, and to you the profit greater, when, bearing in memory what has been lately spoken, you hearken accordingly to what comes afterwards. For no little does this also contribute towards the understanding of what is said, when you know accurately the connection of the thoughts, which we are busy in weaving together for you. For since it is not possible to set down all in one day, you must by continued remembrance make the things laid before you on many days into a kind of chain, and so wrap it about your soul: that the body of the Scriptures may appear entire.
Therefore let us not either today go on to the subjects set before us, without first recalling what was lately said to our memory.
2. But what are the things set before us today? Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying. In a tone worthy of the wonder, with all his might he has uttered his voice, saying, Now all this was done. For when he saw the sea and the abyss of the love of God towards man, and that actually come to pass which never had been looked for, and nature's laws broken, and reconciliations made, Him who is above all come down to him that is lower than all, and the middle walls of partition broken, Ephesians 2:14 and the impediments removed, and many more things than these done besides; in one word he has put before us the miracle, saying, Now all this was done that it might be fulfilled which was spoken of the Lord. For, think not, says he, that these things are now determined upon; they were prefigured of old. Which same thing, Paul also everywhere labors to prove.
And the angel proceeds to refer Joseph to Isaiah; in order that even if he should, when awakened, forget his own words, as newly spoken, he might by being reminded of those of the prophet, with which he had been nourished up continually, retain likewise the substance of what he had said. And to the woman he mentioned none of these things, as being a damsel and unskilled in them, but to the husband, as being a righteous man and one who studied the prophets, from them he reasons. And before this he says, Mary, your wife; but now, when he has brought the prophet before him, he then trusts him with the name of virginity; for Joseph would not have continued thus unshaken, when he heard from him of a virgin, unless he had first heard it also from Isaiah. For indeed it was nothing novel that he was to hear out of the prophets, but what was familiar to him, and had been for a long time the subject of his meditations. For this cause the angel, to make what he said easy to be received, brings in Isaiah. And neither here does he stop, but connects the discourse with God. For he does not call the saying Isaiah's, but that of the God of all things. For this cause he said not, that it might be fulfilled which was spoken of Isaiah, but which was spoken of the Lord. For the mouth indeed was Isaiah's, but the oracle was wafted from above.
Having established Joseph’s faith by all means—by past expectations, by future hopes, by present grace and by the honor given to himself—the angel then rings in the prophet also to give expression in support of all these, proclaiming beforehand the good things that are to occur to the world through the Son: Sins are removed and done away. “For he will save his people from their sins.” Here again the coming event exceeds all human expectation. From what are the people being saved? Not from visible warfare or barbarians but something far greater: from their own sins, a work that had never been possible to anyone before.
To make what he said easier to understand, the angel makes reference to Isaiah, and not to Isaiah only but to God who speaks through Isaiah. For he does not refer this saying to Isaiah as such but to the God of all. Hence he did not say simply that “All this took place to fulfill what was spoken by Isaiah” but “All this took place to fulfill what the Lord had spoken by the prophet.” The mouth indeed was Isaiah’s, but the oracle was wafted from above.
(Verse 22 onwards) Now all this was done that it might be fulfilled which was spoken by the Lord through the prophet, saying: Behold, a virgin shall be with child, and bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us. Then Joseph, being raised from sleep, did as the angel of the Lord had bidden him. And all this was done that it might be fulfilled which was spoken by the Lord through the prophet, saying: Behold, a virgin shall conceive in her womb. But the prophet, because he predicts the future, signifies what is going to happen, and he writes, he will receive: but the evangelist, because he narrates a story not about the future but about the past, changed he will receive to he has received. For he who has, will by no means receive. We read something similar in the Psalms: You have ascended on high, you have led captivity captive: you have received gifts among men (Ps. 67:19). The apostle, in citing this testimony, did not say he received, but he gave: because there it signified about the future that he would receive; here it narrates about the one who had already given what he had received.
(In Is. 7:14.) Since it is introduced in the Prophet by the words, The Lord Himself shall give you a sign, it ought to be something new and wonderful. But if it be, as the Jews will have it, a young woman, or a girl shall bring forth, and not a virgin, what wonder is this, since these are words signifying age and not purity? Indeed the Hebrew word signifying Virgin (Bethula) is not used in this place, but instead the word 'Halmaa,' which except the LXX all render 'girl.' But the word 'Halma' has a twofold meaning; it signifies both 'girl,' and 'hidden;' therefore 'Halma' denotes not only 'maiden' or 'virgin,' but 'hidden,' 'secret;' that is, one never exposed to the gaze of men, but kept under close custody by her parents. In the Punic tongue also, which is said to be derived from Hebrew sources, a virgin is properly called 'Halma.' In our tongue also 'Halma' means holy; and the Hebrews use words of nearly all languages; and as far as my memory will serve me, I do not think I ever met with Halma used of a married woman, but of her that is a virgin, and such that she be not merely a virgin, but in the age of youth; for it is possible for an old woman to be a maid. But this was a virgin in years of youth, or at least a virgin, and not a child too young for marriage.
(In loc.) For that which Matthew the Evangelist says, Shall have in her womb, the Prophet who is foretelling something future, writes, shall receive. The Evangelist, not foretelling the future but describing the past, changes shall receive, into shall have; but he who has, cannot after receive that he has. He says, Lo, a Virgin shall hare in her womb, and shall bear a Son.
(in Is. 7:14.) The LXX and three others translate, 'Thou shalt call,' instead of which we have here, They shall call, which is not so in the Hebrew; for the word 'Charathib,' which all render Thou shalt call, may mean, 'And she shall call,' that is, The Virgin that shall conceive and shall bear Christ, shall call His name Emmanuel, which is interpreted, 'God with us.'
(ubi sup.) It should be known, that the Hebrews believe this prophecy to refer to Ezekias the son of Ahaz, because in his reign Samaria was taken; but this cannot be established. Ahaz son of Jotham reigned over Judæa and Jerusalem sixteen years, and was succeeded by his son Ezekias, who was twenty-three years old, and reigned over Judæa and Jerusalem twenty-nine years; how then can a prophecy prophesied in the first year of Ahaz refer to the conception and birth of Ezekias, when he was already nine years of age? Unless perhaps the sixth year of the reign of Ezekias, in which Samaria was taken, they think is here called his infancy, that is, the infancy of his reign, not of his age; which even a fool must see to be hard and forced. A certain one of our interpreters contends, that the Prophet Isaiah had two sons, Jashub and Emmanuel; and that Emmanuel was born of his wife the Prophetess as a type of the Lord and Saviour. But this is a fabulous tale.
(ubi sup.) What is spoken to Ahaz then is to be thus understood. This Child, that shall be born of a Virgin of the house of David, shall now be called Emmanuel, that is, God with us, because the events (perhaps delivery from the two hostile kings) will make it appear that you have God present with you. But after He shall be called Jesus, that is, Saviour, because He shall save the whole human race. Wonder not, therefore, O house of David, at the newness of this thing, that a Virgin should bring forth a God, seeing He has so great might that though yet to be born after a long while, He delivers you now when you call upon Him.
(Cont. Faust. 12. 45, and 13. 7.) Who so mad as to say with Manichæus, that it is a weak faith not to believe in Christ without a witness; whereas the Apostle says, How shall they believe on Him of whom they have not heard? Or how shall they hear without a preacher? (Rom. 10:14.) That those things which were preached by the Apostles might not be contemned, nor thought to be fables, they are proved to have been foretold by the Prophets. For though attested by miracles, yet there would not have been wanting men to ascribe them all to magical power, had not such suggestions been overcome by the additional testimony of prophecy. For none could suppose that long before He was born, He had raised up by magic prophets to prophesy of Him. For if we say to a Gentile, Believe on Christ that He is God, and he should answer, Whence is it that I should believe on Him? we might allege the authority of the Prophets. Should he refuse assent to this, we establish their credit from their having foretold things to come, and those things having truly come to pass. I suppose he could not but know how great persecutions the Christian religion has formerly suffered from the Kings of this world; let him now behold those very Kings submitting to the kingdom of Christ, and all nations serving the same; all which things the Prophets foretold. He then hearing these things out of the Scriptures of the Prophets, and beholding them accomplished throughout the whole earth, would be moved to faith.
(Hom. 1 and 2. in Conc. Eph. ap. Hard. t. i. pp. 1643. 1655.) Inasmuch as Photinus affirms that He that was now born was mere man, not allowing the divine birth, and maintains that He who now issued from the womb was the man separate from the God; let him show how it was possible that human nature, born of the Virgin's womb, should have preserved the virginity of that womb uncorrupted; for the mother of no man ever yet remained a virgin. But forasmuch as it was God the Word who was now born in the flesh, He showed Himself to be the Word, in that He preserved His mother's virginity. For as our word when it is begot does not destroy the mind, so neither does God the Word in choosing His birth destroy the virginity.
Let them approach to hear this, who ask, Who is He that Mary bare? He shall save His people; not any other man's people; from what? from their sins. That it is God that forgives sins, if you do not believe the Christians so affirming, believe the infidels, or the Jews who say, None can forgive sins but God only. (Luke 5:1.)
(Serm. xxiii. 1.) The conception was by the Holy Spirit within the womb of the Virgin; who, as she conceived in perfect chastity, in like manner brought forth her Son.
It is the custom of the Evangelist to confirm what he says out of the Old Testament, for the sake of those Jews who believed on Christ, that they might recognize as fulfilled in the grace of the Gospel, the things that were foretold in the Old Testament; therefore he adds, Now all this was done.
Here we must enquire why he should say all this was done, when above he has only related the conception. It should be known that he says this to show, that in the presence of God all this was done before it was done among men. Or he says, all this was done, because he is relating past events; for when he wrote, it was all done.
It is a question, who interpreted this name? The Prophet, or the Evangelist, or some translator? It should be known then, that the Prophet did not interpret it; and what need had the Holy Evangelist to do so, seeing he wrote in the Hebrew tongue? Perhaps that was a difficult and rare word in Hebrew, and therefore needed interpretation. It is more probable that some translator interpreted it, that the Latins might not be perplexed by an unintelligible word. In this name are conveyed at once the two substances, the Divinity and Humanity in the one Person of the Lord Jesus Christ. He who before all time was begot in an unspeakable manner by God the Father, the same in the end of time was made Emmanuel, that is, God with us, of a Virgin Mother. This God with us may be understood in this way. He was made with us, passible, mortal, and in all things like unto us without sin; or because our frail substance which He took on Him, He joined in one Person to His Divine substance.
Do not think that only now in these recent times did God resolve to do these things, but from before, even from the beginning. For you know the prophets, Joseph, as the student of the law which you are. Remember what was spoken by the law. He did not say, "what Isaiah had spoken," but, "what the Lord had spoken." For it was not man who spoke, but God, through the mouth of the prophet, and therefore the oracle is trustworthy.
(Dial. tit. 7.) For we know not that any man of that day was called Emmanuel. But the Hebrew objects, How can it be that this was said on account of Christ and Mary, when many centuries intervened between Ahaz and Mary? But though the Prophet was speaking to Ahaz, the prophecy was yet not spoken to him only or of his time only; for it is introduced, Hear, O house of David; (Isa. 7:13.) not, 'Hear, O Ahaz.' Again, The Lord Himself shall give you a sign; meaning He, and none other; from which we may understand that the Lord Himself should be the sign. And that he says to you, (plur.) and not 'to thee,' shows that this was not spoken to Ahaz, or on his account only.
(in App. s. 123.) He, who by a touch could heal the severed limbs of others, how much more could He, in His own birth, preserve whole that which He found whole? In this parturition, soundness of the Mother's body was rather strengthened than weakened, and her virginity rather confirmed than lost.
(ap. Anselm.) Or, he says, all this was done, meaning, the Virgin was betrothed, she was kept chaste, she was found with child, the revelation was made by the Angel, that it might be fulfilled which was spoken. For that the Virgin should conceive and should bring forth would never have been fulfilled, had she not been espoused that she should not be stoned; and had not her secret been disclosed by the Angel, and so Joseph taken her unto him, that she was not dismissed to disgrace and to perish by stoning. So had she perished before the birth, that prophecy would have been made void which says, She shall bring forth a Son. (Isa. 7:14.)
(non occ.) Or it may be said, that the word that does not here denote the cause; for the prophecy was not fulfilled merely because it was to be fulfilled. But it is put consecutively, as in Genesis, He hung the other on the gallows, that the truth of the interpreter might be proved; (Gen. 40:22.) since by the weighing of one, truth is established. So also in this place we must understand it as if it were, that which was foretold being done, the prophecy was accomplished.
(ap. Anselm.) This error then is barred by the Evangelist saying, That it might be fulfilled which was spoken of the Lord by the Prophet. Now one kind of prophecy is by the preordination of God, and must needs be fulfilled, and that without any free choice on our part. Such is that of which we now speak; wherefore he says, Lo, to show the certainty of prophecy. There is another kind of prophecy which is by the foreknowledge of God, and with this our free will is mixed up; wherein by grace working with us we obtain reward, or if justly deserted by it, torment. Another is not of foreknowledge, but is a kind of threat made after the manner of men; as that, Yet forty days, and Nineveh shall be overthrown: (Jonah 3.) understanding, unless the Ninevites amend themselves.
[AD 108] Ignatius of Antioch on Matthew 1:18-25