John 1
The Word Made Flesh — John 1:1-14
John 1:1-14 frames the whole Gospel: "In the beginning was the Word, and the Word was with God, and the Word was God... and the Word became flesh and dwelt among us." The Logos is both distinct from God and fully God. Athanasius made the eternal deity of the Word the linchpin against Arius, a stand vindicated at Nicaea with the term homoousios. Augustine drew on this prologue for his trinitarian theology of the Word. The creational "in the beginning" deliberately echoes Gen 1:1, and the incarnation of 1:14 finds its hymnic parallel in Phil 2:6-7 and Col 1:15-16. The eternal Son enters his own creation.
The Two Natures of Christ — Chalcedon and Colossians 1:15-20
Col 1:15-20 confesses Christ as "the image of the invisible God" in whom "all the fullness of God was pleased to dwell." He is at once the firstborn over creation and the one in whom all things hold together. The Chalcedonian Definition guards this with its four adverbs: without confusion, change, division, or separation — one person in two natures. Gregory of Nazianzus supplied the soteriological rule: what is not assumed is not healed. Aquinas later systematized the hypostatic union. The cosmic Christ of Colossians connects to the Logos of John 1:3 and to the exaltation of Phil 2:9-11. Athanasius's logic — God became man that man might be made divine — undergirds the whole.
The Kenosis — Philippians 2:5-11
Phil 2:5-11 traces Christ's descent and exaltation: though "in the form of God," he "emptied himself, taking the form of a servant," and was therefore "highly exalted." The hymn is the pattern of Christian humility and the map of redemption. Debate centers on the kenosis: of what did Christ empty himself? Chalcedon's two-natures grammar rules out any loss of deity; the self-emptying is the veiling of glory, not its abandonment. Barth read the passage as God's freedom to be lowly, while Bavinck guarded the immutability of the divine nature. The "form of God" language parallels Col 1:15 and John 1:1, and the universal homage of 2:10-11 fulfills the monotheistic oath of Isa 45:23. Every knee will bow to the crucified Lord.
The Deity of Christ — Hebrews 1:1-4
Heb 1:1-4 opens with the Son as "the radiance of the glory of God and the exact imprint of his nature," who "upholds the universe by the word of his power." The Son is not a creature but the eternal heir of all things. Athanasius marshalled this text against any subordination of the Son, and Nicaea confessed him 'true God from true God'. The catena of Old Testament quotations that follows in Hebrews 1 applies divine titles directly to Christ. The creative agency of 1:2-3 matches the Logos of John 1:3 and the cosmic Christ of Col 1:16-17. Aquinas treats the Son's consubstantial glory as the basis of his priestly mediation, which Hebrews will develop in chapter 9.
The Virgin Birth — Isaiah 7:14 and Matthew 1
Matt 1:22-23 reads the birth of Jesus as the fulfillment of Isa 7:14: "the virgin shall conceive and bear a son, and they shall call his name Immanuel." Matthew hears in Immanuel, "God with us," the whole meaning of the incarnation. Irenaeus saw the virgin birth as the new beginning of humanity, Mary undoing the knot of Eve. Aquinas defended its fittingness: the new creation requires a new origin. The sign given to faithless Ahaz becomes the sign to the world. The Immanuel theme frames the whole Gospel, returning in Matt 28:20, "I am with you always." It connects to the Word made flesh in John 1:14 and to the protoevangelium's promised seed in Gen 3:15.
The Suffering Servant — Isaiah 53
Isa 53:4-6 is the Old Testament's deepest exposition of substitution: "he was pierced for our transgressions... and the LORD has laid on him the iniquity of us all." The Servant suffers not for his own sin but for the people's. Athanasius read the Servant's death as the divine Word bearing what was ours, and Calvin treated Isaiah 53 as the clearest prophecy of penal substitution. The New Testament quotes it more than any other chapter of the prophets. The sin-bearing of 53:6 illuminates the hilasterion of Rom 3:25 and the atoning blood of Lev 16:15. It is fulfilled in the Lamb of God of John 1:29, the one who takes away the sin of the world.
Why God Became Man — Athanasius on the Incarnation
Athanasius's thesis is famous: the Word became man so that we might be made divine. He reads John 1:14 as the divine remedy for human corruption and death, grounding the whole argument in the creative and re-creative work of the Word. The logic is soteriological: only the Creator can renew the image he made, so only God incarnate can save. Gregory of Nazianzus sharpened the rule — what is not assumed is not healed, and Irenaeus had cast it as recapitulation. This deification theme connects to the image of God in Gen 1:27 and to the glory shared with believers in Rom 8:29-30. Nicaea's homoousios is the grammatical guardrail of the whole vision.
The Eternal Generation of the Son — John 5:26
John 5:26 is a key text for eternal generation: "as the Father has life in himself, so he has granted the Son also to have life in himself." The Son's life is the Father's own life, eternally communicated. Nicaea confessed the Son 'begotten, not made,' eternally from the Father, and Augustine guarded this against any temporal subordination. Aquinas treated generation as an eternal act of the divine intellect. The mutual life of Father and Son connects to the Logos who was with God in John 1:1 and to the radiance of God's glory in Heb 1:3. Generation is eternal, not an event within time.
Creation Ex Nihilo — Genesis 1:1-3
Gen 1:1-3 opens Scripture with God creating "the heavens and the earth" by his word: "Let there be light." The church reads this as creation out of nothing — no pre-existing matter constrains the Creator. Augustine wrestled with the nature of time and the 'beginning' itself, and Aquinas defended creation ex nihilo as a truth of reason confirmed by revelation. Irenaeus had already used it against Gnostic emanationism. The creating word of 1:3 is identified in the New Testament with the Logos of John 1:1-3 and the Son of Col 1:16. Creation and redemption share one agent: the Word through whom all things were made.
The Image of God — Genesis 1:26-27
Gen 1:26-27: "Let us make man in our image, after our likeness... male and female he created them." The imago Dei grounds human dignity, dominion, and relationality. Augustine located the image especially in the soul's rational powers, mirroring the Trinity, while Irenaeus distinguished image and likeness, the latter restored by the Spirit. Bavinck argued the whole person, not merely the intellect, bears the image. The plural "let us" has long been read in trinitarian light alongside John 1:26. The image marred at the fall of Gen 3:6-7 is renewed in Christ, the true image of Col 1:15.
The Binding of Isaac as Type — Genesis 22
Gen 22:9-14 recounts the Akedah: Abraham binds Isaac, raises the knife, and is stopped by the angel; a ram caught in the thicket is offered "instead of his son." "The LORD will provide" becomes the name of the place. Irenaeus and the Fathers read Isaac as a type of Christ, the beloved son carrying the wood of his own sacrifice. Aquinas treated the substituted ram as a figure of the atonement. The mountain of Moriah is traditionally linked to the place of the cross. James cites this scene as the proof of Abraham's living faith in Jas 2:21, and the provided substitute points to the Lamb of God in John 1:29 and the beloved Son of Rom 8:32, whom God 'did not spare.'
The Passover and the Lamb of God — Exodus 12 and John 1:29
Exod 12:21-27 institutes the Passover: a lamb without blemish, its blood on the doorposts, and the LORD passing over the houses so marked. Israel is redeemed by substitutionary blood and a shared meal. Calvin read the Passover as a sacrament of the old covenant, pointing to Christ, and Augustine saw in the lamb a figure of the crucified Lord. John the Baptist names Jesus "the Lamb of God who takes away the sin of the world." The Passover lamb of Exodus is fulfilled in the Lamb of God of John 1:29 and becomes the framework for the Lord's Supper in 1Cor 11:23-26. Paul says plainly, "Christ our Passover lamb has been sacrificed" in 1Cor 5:7.