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Luke's Genealogy and Jesus' Legal Humanity

Luke's genealogy of Jesus, found in Luke 3:23-38, traces Jesus' lineage backward from Joseph all the way to Adam, emphasizing Jesus' connection to all humanity as the "Son of God" [4, 9]. This contrasts with Matthew's genealogy, which descends from Abraham to Joseph, highlighting Jesus' royal claim as the heir of David's throne and the fulfillment of God's promises to Abraham [4]. Both genealogies are understood by Christian antiquity to be those of Joseph, Jesus' legal father [2, 7].

The phrase "being, as was supposed, the son of Joseph" (Luke 3:23) is crucial for understanding Jesus' legal humanity within Luke's account [6]. While Jesus was conceived by the Holy Spirit and born of the Virgin Mary (Luke 1:31, 35) [3, 12], Joseph's legal fatherhood was essential for establishing Jesus' rightful place within the human family and, specifically, within the lineage of David. The human nature of Christ was necessary for his mediatorial office, as he was "born of a woman" and partook in "flesh and blood" (Galatians 4:4; Hebrews 2:14) [3, 5]. This true humanity is demonstrated by his birth, circumcision (Luke 2:21), and growth in wisdom and stature (Luke 2:52) [3, 1].

The differences between Luke's and Matthew's genealogies have been a subject of discussion. One proposal suggests that Luke's genealogy might be that of Mary, given her probable role as a primary source for Luke [4]. However, this view was largely unknown in Christian antiquity and was first proposed in the 15th century by Latin divines [7]. Instead, the consensus in early Christian thought was that both genealogies trace Joseph's lineage, either through adoption or because Jacob and Heli (named in Matthew and Luke respectively as Joseph's father) were brothers [7]. John Calvin, for instance, argues against the idea that Matthew's genealogy traces Mary's line, emphasizing that Jesus was truly begotten of the seed of David through Joseph's legal connection [8].

Luke's decision to present the genealogy in ascending order, starting from Jesus and going back to Adam, serves to underscore Jesus' universal significance [4, 13]. By connecting Jesus to Adam, Luke portrays him not just as the Messiah of Israel, but as the representative of all humanity, the "son of God" in a broader sense, reflecting Adam's original creation by God [9]. This universal scope aligns with Luke's broader theological emphasis on Jesus' mission to all nations. Augustine notes that Luke places the genealogy at the point of Christ's baptism and presents it in ascending order, attributing to Jesus "preferentially the character of a priest in the expiation of sins" [13]. This priestly role, alongside his kingly character, is central to Jesus' identity [10].

The legal aspect of Jesus' humanity, secured through Joseph, allowed him to fulfill prophecies concerning the Messiah's descent from David [2]. As the "son and heir of David," Jesus was qualified to be the Messiah [2]. His submission to the law, exemplified by his circumcision, further demonstrates his full identification with humanity and his role in fulfilling and ultimately transcending the Mosaic law [14]. The incarnation, where the Son of God took on human nature, was an act of profound condescension, uniting a divine person with a human nature [5]. This union resulted in the exaltation of Jesus' humanity, immeasurably raising it above any other human existence [11].

Sources

  1. Luke “Luke 2:52 (YLT) — and Jesus was advancing in wisdom, and in stature, and in favour with God and men.”
  2. Smith's Bible Dictionary “Smith's Bible Dictionary: Genealogy Of Jesus Christ — The New Testament gives us the genealogy of but one person, that of our Saviour. This is given because it was important to prove that Jesus fulfilled the prophecies spoken of him. Only as the son and heir of David should he be the Messiah. The following propositions will explain the true construction of these genealogies:-- + They are both the genealogies of Joseph, i.e. of Jesus Christ as the reputed and legal son of Joseph and Mary. + The genealogy of St. Matthew is Joseph's genealogy as legal successor to the throne of David. St. Luke's ”
  3. Torrey's Topical Textbook “Torrey's Topical Textbook: Human Nature of Christ, The — Was necessary to his mediatorial office -- 1Ti 2:5; Heb 2:17; Ga 4:4,5; 1Co 15:21; Ro 6:15,19. Is proved by his Conception in the Virgin's womb. -- Mt 1:18; Lu 1:31. Birth. -- Mt 1:16,25; 2:2; Lu 2:7,11. Partaking of flesh and blood. -- Joh 1:14; Heb 2:14. Having a human soul. -- Mt 26:38; Lu 23:46; Ac 2:31. Circumcision. -- Lu 2:21. Increase in wisdom and stature. -- Lu 2:52. Weeping. -- Lu 19:41; Joh 11:35. Hungering. -- Mt 4:2; 21:18. Thirsting. -- Joh 4:7; 19:28. Sleeping. -- Mt 8:24; Mr 4:38. Being subject to weariness. -- Joh 4:6. ”
  4. Luke (Protestant academic) “Tyndale House on Luke 3:23: 3:23-38 This genealogy reverses Matthew’s order (Matt 1:1-17). Luke lists Jesus’ lineage back to Adam, possibly to show Jesus’ connection with all humanity as the Son of God (Luke 3:38). Matthew’s genealogy descends from Abraham to Joseph, highlighting Jesus’ status as the rightful heir of David’s throne and the recipient of God’s promises to Abraham. The great differences between the two genealogies have led some to propose that Luke’s genealogy is that of Mary (see study note on 3:23), who was probably among Luke’s primary sources. 3:23 Jesus was about thirty year”
  5. CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 2, section 126: substance of the Virgin Mary.” This is involved in the Scriptural statement that He was born of a woman, which can only mean that He was born in the sense in which other children of men are born of women. This is essential to his true humanity, and to that likeness to men which makes them his brethren, and which was se cured by his taking part in flesh and blood. ( Heb. ii. 14 .) The incarnation of the Son of God, his stooping to take into personal and perpetual union with Himself a nature infinitely lower than his own, was an act of uns”
  6. Luke (Presbyterian) “Jamieson, Fausset & Brown on Luke 3:23: GENEALOGY OF JESUS. (Luke 3:23-38) he began to be about thirty--that is, "was about entering on His thirtieth year." So our translators have taken the word (and so CALVIN, BEZA, BLOOMFIELD, WEBSTER and WILKINSON, &c.): but "was about thirty years of age when He began [His ministry]," makes better Greek, and is probably the true sense [BENGEL, OLSHAUSEN, DE WETTE, MEYER, ALFORD, &c.]. At this age the priests entered on their office (Num 4:3). being, as was supposed, the son of Joseph, &c.--Have we in this genealogy, as well as in Matthew's, the line of”
  7. Schaff ANF/NPNF (Patristic) “ANF Vol 6: Gregory Thaumaturgus, Dionysius, Julius Africanus, Methodius, Arnobius — ELUCIDATIONS.: I. (Joseph the son of both, p. 127.) The opinion that Luke's genealogy is that of Mary was unknown to Christian antiquity. In the fifteenth century it was first propounded by Latin divines to do honour (as they supposed) to the Blessed Virgin. It was first broached by Annius of Viterbo, A.D. 1502.Christian antiquity is agreed that:-- 1. Both genealogies are those of Joseph. 2. That Joseph was the son of Jacob or of Heli, either by adoption, or because Jacob and Heli were either own brothers or ha”
  8. CCEL (Reformed) “John Calvin, Institutes of the Christian Religion, section 49: declaring him to be “God blessed for ever,” he mentions separately, that, “as concerning the flesh, he was descended from the Jews.” Again if he had not been truly begotten of the seed of David, what is the meaning of the expression, that he is the “fruit of his loins;” or what the meaning of the promise, “Of the fruit of thy body will I set upon thy throne?” ( Ps. 132:11 ). Moreover their mode of dealing with the genealogy of Christ, as given by Matthew, is mere sophistry; for though he reckons up the progenitors not of Mary, but ”
  9. Luke (Baptist/Reformed) “John Gill on Luke 3:37: Which was the son of Enos,.... Gen 5:9 which was the son of Seth, Gen 5:6 which was the son of Adam Gen 5:3 which was the son of God: not begotten, as all the rest were, by their immediate parents, but created by God, in a supernatural manner, out of the dust of the earth, and quickened with the breath of God: so Adam is, by the Jews (h) called, , "the son of God": though this may be understood of Jesus; the son of Joseph, of Heli, &c. and so on to this clause, "the son of God"; being so as a divine person, to whom the human nature was united, and on that account so ”
  10. Schaff ANF/NPNF (Patristic) “NPNF1 Vol 6: Augustine — Homilies on the Gospels — CHAP. III.--OF THE FACE THAT MATTHEW, TOGETHER WITH MARK, HAD SPECIALLY IN VIEW THE KINGLY CHARACTER OF CHRIST, WHEREAS LUKE DEALT WITH THE PRIESTLY. (part 1): 5. For the Lord Jesus Christ, who is the one true King and the one true Priest, the former to rule us, and the latter to make expiation for us, has shown us how His own figure bore these two parts together, which were only separately commended [to notice] among the Fathers.(1) This becomes apparent if (for example) we look to that inscription which was affixed to His cross"King of the J”
  11. CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 2, section 80: that is, whosoever religiously worships Him and looks to Him as his God and Saviour, shall be saved, whether in a dungeon or alone in a desert. The Exaltation of the Human Nature of Christ. Another consequence of the hypostatical union is the exaltation of the humanity of Christ. As the human body in virtue of its vital union with an immortal soul, is immeasurably exalted above any mere material organization in the universe (so far as known or revealed), so the humanity of Christ in virtue of its union with his divine nature is immeasurab”
  12. Luke (Methodist/Wesleyan) “Adam Clarke on Luke 1:38: Behold the handmaid of the Lord - I fully credit what thou sayest, and am perfectly ready to obey thy commands, and to accomplish all the purposes of thy grace concerning me. It appears that at the instant of this act of faith, and purposed obedience, the conception of the immaculate humanity of Jesus took place; and it was Done unto her according to his word. See Luk 1:35.”
  13. Schaff ANF/NPNF (Patristic) “NPNF1 Vol 6: Augustine — Homilies on the Gospels — CHAP. IV.--OF THE REASON WHY FORTY GENERATIONS (NOT INCLUDING CHRIST HIMSELF) ARE FOUND IN MATTHEW, ALTHOUGH HE DIVIDES THEM INTO THREE SUCCESSIONS OF FOURTEEN EACH. (part 4): not at the commencement of his Gospel, but at the point of Christ's baptism, and gives them not in the descending, but in the ascending order, ascribing to Him preferentially the character of a priest in the expiation of sins, as where the voice from heaven declared Him, and where John himself delivered his testimony in these terms: "Behold the Lamb of God, that taketh a”
  14. Luke (Nonconformist/Puritan) “Matthew Henry on Luke 2:21: Our Lord Jesus, being made of a woman, was made under the law, Gal 4:4. He was not only, as the son of a daughter of Adam, made under the law of nature, but as the son of a daughter of Abraham was made under the law of Moses; he put his neck under that yoke, though it was a heavy yoke, and a shadow of good things to come. Though its institutions were beggarly elements, and rudiments of this world, as the apostle calls them, Christ submitted to it, that he might with the better grace cancel it, and set it aside for us. Now here we have two instances of his being made”
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