Significance of Christ's Humanity and Divinity in Theology
The union of divine and human natures in the person of Jesus Christ stands as the central mystery of Christian theology, shaping doctrines of salvation, mediation, and the very possibility of reconciliation between God and humanity. This doctrine, known as the Incarnation, affirms that "Christ took our human nature into union with his Divine Person" [2], establishing a hypostatical (personal) union in which "the two natures are not mixed or confounded, and it is perpetual" [2].
The Necessity of Christ's Full Humanity
Scripture presents Christ's human nature as essential to his mediatorial work. The apostle Paul declares that "there is one God, and one mediator between God and men, the man Christ Jesus" (1 Timothy 2:5), while the author of one tradition insists that "in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest" (Hebrews 2:17) [1]. This necessity extends beyond theological abstraction into concrete historical reality: Christ's conception in the virgin's womb, his birth, his partaking of flesh and blood, his possession of a human soul, his circumcision, and his growth in wisdom and stature all demonstrate genuine humanity [1]. The Gospel accounts record him weeping, hungering, thirsting, sleeping, and experiencing weariness [1]—not as theatrical displays but as authentic participation in human limitation.
The theological rationale for this full humanity centers on representation and substitution. As one commentary notes, Christ's work in "both the great departments of His work—life-giving and judgment" required "the indwelling of the Son's essential life in humanity as the great theater and medium of divine display" [3]. The appointment of a judge "in our own nature" represents "one of the most beautiful arrangements of divine wisdom in redemption" [3], ensuring that humanity faces judgment from one who has genuinely shared human experience.
The Indispensability of Christ's Divinity
Yet humanity alone could not accomplish redemption. The fullness of deity dwelling in Christ "bodily" (Colossians 2:9) distinguishes him from every prophet and teacher [5]. This indwelling occurs "in the human nature of Christ, in the highest and most exalted manner" [5], surpassing God's presence in the tabernacle, temple, or even in believers through grace. The incarnation constitutes "a mystery, which though revealed, and so to be believed, is not to be discerned nor accounted for, nor the modus of it to be comprehended by reason" [6]. It ranks as "a great one, next, if not equal, to the doctrine of a trinity of persons in the divine essence" [6].
Divine attributes predicated of Christ include actions that only God can perform: Acts 20:28 speaks of the church "purchased with his own blood," Romans 8:32 describes God not sparing "his own Son," and 1 Corinthians 2:8 identifies the crucified one as "the Lord of glory" [2]. These passages attribute human suffering and death to a divine person, demonstrating that "a Divine Person was united to a human nature" [2].
The Two Humanities
Paul's Adam-Christ typology in 1 Corinthians 15 illuminates the theological stakes. "Adam and Christ founded two distinct humanities: One is natural and earthly, enslaved to sin and death; the other is spiritual and heavenly, purified and destined for life" [4]. Adam represents the natural body; Christ represents the spiritual resurrection body [4]. This contrast reveals why both natures matter: without genuine humanity, Christ could not represent the first Adam's race; without divinity, he could not inaugurate a new humanity characterized by "life-giving Spirit" that "supersedes the natural life" [4].
The incarnation thus becomes "a mystery of godliness, which tends to encourage internal and external religion, powerful and practical" [6]. It grounds the Christian hope not in abstract principles but in the historical reality of God entering human flesh, experiencing human suffering, and transforming human nature from within. The "glory that should follow" encompasses not only Christ's resurrection and ascension but "that grand manifestation of God's infinite love to the world in causing the Gospel of his Son to be everywhere preached" and "the ineffable glorification of the human nature of Jesus Christ, which, throughout eternity, will" remain united to divinity [7]. This perpetual union ensures that humanity has an eternal advocate who knows human frailty from experience and possesses divine power to save completely.
Sources
- 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. ”
- Easton's Bible Dictionary “Easton's Bible Dictionary: Incarnation — That act of grace whereby Christ took our human nature into union with his Divine Person, became man. Christ is both God and man. Human attributes and actions are predicated of him, and he of whom they are predicated is God. A Divine Person was united to a human nature (Acts 20:28; Rom. 8:32; 1 Cor. 2:8; Heb. 2:11-14; 1 Tim. 3:16; Gal. 4:4, etc.). The union is hypostatical, i.e., is personal; the two natures are not mixed or confounded, and it is perpetual.”
- John (Presbyterian) “Jamieson, Fausset & Brown on John 5:27: because he is the Son of man--This seems to confirm the last remark, that what Christ had properly in view was the indwelling of the Son's essential life in humanity as the great theater and medium of divine display, in both the great departments of His work--life-giving and judgment. The appointment of a Judge in our own nature is one of the most beautiful arrangements of divine wisdom in redemption.”
- 1 Corinthians (Protestant academic) “Tyndale House on 1 Corinthians 15:45: 15:45-49 Adam and Christ founded two distinct humanities: One is natural and earthly, enslaved to sin and death; the other is spiritual and heavenly, purified and destined for life. Adam represents the natural (physical) body and Christ the spiritual (resurrection) body. See also 15:21-22; Rom 5:12-21. 15:45-46 Just as Christ’s life-giving Spirit supersedes the natural life, the spiritual body will supersede the physical body.”
- Colossians (Baptist/Reformed) “John Gill on Colossians 2:9: For in him dwelleth all the fulness of the Godhead bodily. This is to be understood, not of the doctrine, or Gospel of Christ, as being a perfect revelation of the will of God; but of Christ, and particularly of his human nature, as consisting of a true body and a reasonable soul, in which the Godhead dwells in a most eminent manner: God indeed is everywhere by his powerful presence, was in the tabernacle and temple in a very singular manner, and dwells in the saints in a way of special grace; but resides in the human nature of Christ, in the highest and most exalt”
- 1 Timothy (Baptist/Reformed) “John Gill on 1 Timothy 3:16: And without controversy great is the mystery of godliness,.... What follows is so, the incarnation of Christ, his birth of a virgin, the union of the two natures, divine and human, in his person; this is a mystery, which though revealed, and so to be believed, is not to be discerned nor accounted for, nor the modus of it to be comprehended by reason: and it is a great one, next, if not equal, to the doctrine of a trinity of persons in the divine essence; and is a mystery of godliness, which tends to encourage internal and external religion, powerful and practical g”
- 1 Peter (Methodist/Wesleyan) “Adam Clarke on 1 Peter 1:11: The glory that should follow - Not only the glory of his resurrection, ascension, exaltation, and the effusion of his Spirit; but that grand manifestation of God's infinite love to the world in causing the Gospel of his Son to be everywhere preached, and the glorious moral changes which should take place in the world under that preaching, and the final glorification of all them who had here received the report, and continued faithful unto death. And we may add to this the ineffable glorification of the human nature of Jesus Christ, which, throughout eternity, will ”