Secondly, after him erred Valentine, who said that he brought a heavenly body with him, that it was not assumed from the Virgin, but that it passed through her as water through a channel. But Rom (1:3) says against this: "Who was made from the seed of David according to the flesh."
The third error was that of Apollinaris, who said that he received only a body and no soul, but that in place of a soul he had his divinity. But against this is the fact that Christ frequently says: "My soul is sorrowful" (Jn 12:27). but on this account he later changed his opinion and said that Christ had a vegetal and sensitive soul, but still no rational soul, in place of which was his divinity. But then would follow the awkward situation that Christ would not have been any more man than a brute.
These errors were assigned as though by lot to the four evangelists. For Mark and John mainly destroyed the errors touching the divinity; hence John asserted immediately in the beginning: "In the beginning was the Word." And Mark began thus: "The beginning of the gospel of Jesus Christ, the son of God. He did not say, "the son of Abraham". Matthew and Luke destroy in the beginning those errors which concern the humanity.
Hence in the statement, son of David, son of Abraham , all errors about the humanity of Christ are excluded. For one is not called the son of someone except in virtue of univocal generation, which is according to agreement in species. For no matter what is generated from a man, unless it shares in the nature of the species, it is never called a son; as is evident in the case of lice and the like. Therefore, if Christ is the son of David and of Abraham, he should have the same nature by reason of the same species; but he would not have the same specific nature, if he had not a true and natural body, or if he took it from heaven, or even if it lacked a sensitive or a rational soul. Hence, the exclusion of every error is clear.
1—2
Mt 1:2-6a
2. Abraham begot Isaac. And Isaac begot Jacob. And Jacob begot Judas and his brethren. 3. And Judas begot Phares and Zara of Thamar. And Phares begot Esron. And Esron begot Aram. 4. And Aram begot Aminadab. And Aminadab begot Naasson. And Naasson begot Salmon. 5. And Salmon begot Booz of Rahab. And Booz begot Obed of Ruth. And Obed begot Jesse. 6. And Jesse begot David the king.
Having presented the title, the genealogical series is woven. This is divided into three parts according to the three series of fourteen, out of which the aforesaid genealogical series is woven. The first set of fourteen is from Abraham to David, who came forth through patriarchs. The second goes from David to the Babylonian transmigration and proceeds through the kings. The third is from the transmigration to Christ, and begins with leaders and proceeds through private persons. The second is at and David was the father of Solomon ; the third at and after the transmigration to Babylon...
The first is divided into three parts: first are mentioned the fathers who lived before the entry into Egypt; secondly, those who were involved in the exodus and in the entry into the promised land; thirdly, those who existed after the entry into the promised land. He says, therefore: Abraham was the father of Isaac .
Here it should be noted, before we proceed any further, that two evangelists describe the generation of Christ according to the flesh; namely, Luke and Matthew, but differently. This difference consists in five things.
For, first, they differ as to its position in the work: because Matthew begins to weave the generation of Christ at the beginning of his Gospel, but Luke not at the beginning, but after the baptism. The reason for this, according to Augustine, is that Matthew undertook to describe the fleshly generation of Christ; therefore, he should have presented it immediately in the beginning. But Luke's main purpose was to comment in Christ the priestly person. It pertains to a priest to expiate for sins. Therefore, after the baptism, in which expiation of sins takes place, was the suitable time to present the generation of Christ.
But secondly, Luke and Matthew in the genealogy of Christ differ in regard to order; because Matthew wove Christ's generation by beginning with Abraham and by descending to Christ, but Luke begins with Christ and by ascending proceeds to Abraham and much further. The reason is that according to the Apostle (Rom 4:25), there were two things in Christ, namely, the humility to assume the defects of our nature and the power of divinity and grace, through which he purged us from these defects. (Rom 8:3): "God sent his own Son in the likeness of sinful flesh," on account of the first; "and for sin he condemned sin in the flesh," on account of the second. Therefore, Matthew, who is interested in Christ's fleshly generation through which he descended so far as to assume our weakness, fittingly describes his generation by descending. But Luke, who commends in him his priestly dignity, through which we are reconciled to God and united to Christ, fittingly proceeded by ascending.
Thirdly, they differ as to manner: because in the narration of the genealogy Matthew used the word begot [Lat. Vulg.] and Luke the word "was of". And this occurs, because Matthew in the entire narration mentions only fathers according to the flesh; but Luke mentions many fathers according to the Law or by adoption. For it had been commanded in the Law that if a man should die without children, his brother should take his wife and raise up children for him. Hence, they were not the children of the one who begot them, but by adoption they were regarded as belonging to the previous husband. Hence, Luke, who mentions many sons by adoption, does not say "begot"; because, although they had not begotten them, yet they were theirs by adoption. But Matthew, who mentions only fathers according to the flesh, says begot . The reason for this is that, as has been stated, Matthew is concerned mainly with Christ's humanity. And because according to the flesh he was born of parents according to the flesh, no one is mentioned in Matthew's genealogy who was not a father according to the flesh. But Luke stresses in Christ the priestly dignity through which we are adopted as God's sons; therefore, he mentioned fathers not only according to the flesh but also those according to the Law.
They differ, fourthly, as to termini: because Matthew begins his genealogy with Abraham and continues it to Christ; but Luke goes from Christ not only to Abraham but as far as God. The reason for this can be taken from the fact that Matthew wrote to the Hebrews, who boasted of Abraham: "We are descendants of Abraham" (Jn 8:33), who was the first principle of believing; and therefore, Matthew begins with Abraham. But Luke wrote to the Greeks, who knew nothing about Abraham except through Christ: for if Christ had not existed, they would have known nothing about Abraham; therefore, Luke began with Christ and ended not only in Abraham, but in God.
They differ, fifthly, as to the persons listed: because in Luke's entire genealogy no woman is mentioned; but in Matthew some women are introduced. The reason for this, according to Ambrose, is that Luke, as has been said, commands especially the priestly dignity; but the greatest purity is required in a priest. But Matthew wove his genealogy according to the flesh; therefore some women are mentioned there.
Yet it should be noted that in all of Matthew's genealogy only women who were sinners are mentioned, either because she had been noted for some sin, as Tamar, who committed fornication (Gen 38:24) and Ruth, who had been an idolater and a gentile; and Uriah's wife, who was an adulteress (2 Sam 11:2). These were mentioned to designate, according to Jerome, that he whose genealogy is given, entered the world to redeem sinners. Another reason is given by Ambrose, namely, in order to remove embarrassment from the Church. For if Christ willed to be born of sinners, unbelievers should not jeer, if sinners join the Church. Another reason can be assigned, I believe, according to Chrysostom, in order to show the imperfection of the Law and that Christ came to fulfill the Law. The fact that certain female sinners are mentioned denotes that those who were greatest in the Law were sinners; as David and Judah. And in this is designated the imperfection of others. For if those were sinners, then much more the others: "All have sinned and need the glory of God" (Rom 3:23). And therefore they are mentioned in the genealogy of Christ to designate that he had fulfilled the Law. Note, however, that those women, although they had been sinners, were not so at the time in which their genealogy is woven; but they had already been cleansed by penance.
He says, therefore, Abraham was the father of Isaac . Here two things should be considered according to the letter, or literal sense. First, that by those fathers mentioned Christ is designated; secondly, that even those are referred or can be referred to our instruction. He says, therefore, first: Abraham was the father of Isaac . And this is stated in Gen (c. 21). But Isaac was the father of Jacob (Gen c. 25). And Jacob was the father of Judah and his brothers . Here one asks, since Abraham had another son besides Isaac, namely, Ishmael, as did Isaac, why no mention is made of them here, when it says, Judah and his brothers . Also, why is Judah expressly mentioned by name rather than the others.
The reason is that Judah and his brothers continued in the worship of the one God and, therefore, they are mentioned in the genealogy of Christ; but not Isaac and Ishmael, or Jacob and Esau. As to the second, this occurred to show that in Christ Jacob's prophecy was fulfilled: "The scepter shall not depart from Judah nor the ruler's staff from between his feet, until he comes to whom it belongs. And he will be the expected of the gentiles" (Gen 29:10); "For it is evident that our Lord was descended from Judah" (Heb 7:14); and that is why he is mentioned rather than the others.
Judah was the father of Perez and Zerah by Tamar . Here one asks, since the Lord was not born of Zerah but of Perez, why was the former mentioned? Also, why was he expressed by name, whereas previously he said, his brothers ? The answer, according to Ambrose, is that this took place in a mystery. To understand this, note the story in Gen (c. 38) that in Tamar's delivery, Zerah appeared first and the midwife tied a scarlet thread on his hand and said: (5:28) "This one came out first." Therefore, his name was called Zerah. But as he drew back his hand, the other came out. The midwife said: "What a breach you have made for yourself." But Zerah, who appeared first, signifies the Jewish people on whose hand the midwife tied the scarlet thread, i.e., circumcision, which involves a flow of blood. But as he drew back his hand, the other came out, because "a blinding has come upon part of Israel" (Rom 11:25). For thus the divided gentile people entered into the light of faith, having come from the matrix of ignorance and unbelief.
Secondly, it should be noted that by the fathers mentioned in the genealogy of Christ, Christ is signified either by reason of the name or of a deed or of something else, as is clear. For Abraham means the father of many nations and signifies Christ, about whom Heb (2:10) says: "Who had brought many sons to glory." Furthermore, at the Lord's command Abraham left his homeland (Gen 12:4), and it is Christ who said in Jeremiah (12:7): "I have forsaken my house, I have abandoned my heritage." In like manner Abraham, who laughed, saying: "God has made laughter for me" (Gen 21:6); and it is Christ at whose birth joy is announced not to one person alone but to the entire world: "Behold, I bring you news of great joy, which will come to all the people; for to you is born this day in the city of David a Savior, who is Christ the Lord" (Lk 2:10). Similarly, by Jacob, both by reason of its meaning and by reason of an action, as is evident from his putting a stone, i.e., the hardness of the passion, under his head. In like manner by Judah and Perez, which means division: for he will divide the sheep from the goats (Mt 25:32).
But morally, in those generations the status of our justification is designated according to the six requirements for justification:
namely, faith, by Abraham, who was justified by the righteousness of faith; for elsewhere he is called the principle of faith: "The purpose was to make him the father of all who believe without being circumcised" (Rom 4:11).
Isaac, hope, because it means laughter: "Rejoice in hope" (Rom 12:12).
Jacob, charity, for he took two wives: Leah, which means labor, and Rachel, i.e., the two lives inspired by charity according to the two precepts: for the contemplative delights in God; the active is the life through which the neighbor is helped.
Judah, confession, which is twofold: of faith: "Man believes with his heart and so is justified, and he confesses with his lips and so is saved" (Rom 10:10). The other confession is of sins: "Confess your sins to one another" (James 5:16).