The Doctrine of the Son: Christology in Evangelical Theology
Christology is the branch of Christian theology devoted to the study of Jesus Christ, His person, His nature, and His redemptive work. It seeks to articulate who Jesus is in relation to the Father and the Spirit, and to explain the significance of His incarnation, death, resurrection, and promised return. Within Evangelical theology, Christology stands at the center of doctrinal formulation because salvation, revelation, and the fulfillment of God’s covenant purposes converge in the Son. The authority of Scripture governs this study, and the goal of interpretation is to discover the author intended meaning under the inspiration of the Holy Spirit. As Kevin Gary Smith explains in his framework for evangelical exegesis, interpretation aims to discern the message the Spirit intended through the human authors of Scripture. Therefore, the doctrine of the Son must be grounded in careful biblical analysis rather than speculative philosophy.
The New Testament presents Jesus Christ as both fully divine and fully human. This confession did not emerge from later theological invention but from the apostolic witness itself. Evangelical theology affirms biblical inerrancy and understands Christology as arising from the total canonical witness. The church’s doctrinal formulations, though historically developed, reflect the theological synthesis of Scripture. Christology therefore integrates biblical revelation, systematic reflection, and redemptive history. The doctrine of the Son reveals the heart of the gospel and defines the mission of the church.
The Incarnate Son of God
The foundational affirmation of Christology is that Jesus is the incarnate Son of God. John 1:14 declares, “And the Word became flesh and dwelt among us” (ESV). The eternal Logos did not cease to be divine but assumed human nature. According to James P. Boyce, the person of Christ unites true deity with true humanity in one person, forming the essential foundation of redemption. This union preserves both the transcendence of God and the nearness of God.
The incarnation demonstrates divine condescension without divine compromise. As Norman Geisler clarifies in his discussion of divine accommodation, God adapts His revelation to human finitude without accommodating Himself to error. In Christ, God reveals Himself in human history without diminishing His holiness or omniscience. The Son remains eternally divine while entering temporal existence.
The Gospels consistently affirm Jesus’ divine identity. He forgives sins, receives worship, exercises authority over nature, and claims unity with the Father. At the same time, the narratives present authentic humanity. Jesus experiences hunger, fatigue, sorrow, and physical death. The incarnation is not symbolic but ontological. The Son truly became man for our salvation.
The Hypostatic Union
Evangelical Christology affirms the hypostatic union, which teaches that Jesus Christ is one person in two distinct natures. R. A. Torrey explains that Scripture attributes divine names, attributes, and works to Christ while also affirming His genuine humanity. These affirmations do not describe two persons but one person possessing two complete natures.
The divine nature is eternal, omnipotent, omniscient, and immutable. The human nature is finite, passible, and capable of suffering. These natures are united without confusion or mixture. They remain distinct yet inseparable. The unity of person ensures that the acts of Christ, whether divine or human, belong to the one Mediator.
This union safeguards both redemption and revelation. Only one who is fully God can reveal the Father perfectly. Only one who is fully human can represent humanity as the second Adam. The hypostatic union therefore grounds substitutionary atonement and mediatorial priesthood. Christ’s obedience carries infinite value because of His divine person.
The Work of Salvation
The doctrine of the Son culminates in the work of salvation. Scripture presents Christ as Prophet, Priest, and King. Boyce describes the atonement as the satisfaction of divine justice through the substitutionary sacrifice of Christ. The cross demonstrates both God’s righteousness and His mercy.
Christ’s priestly work fulfills Old Testament typology. The sacrificial system anticipated a final and perfect offering. Hebrews declares that Christ entered once for all into the holy places by means of His own blood, thus securing eternal redemption. His resurrection vindicates His person and confirms the sufficiency of His sacrifice.
Salvation is not merely moral influence but objective reconciliation. Through His death, Christ bears the penalty of sin. Through His resurrection, He inaugurates new creation life. Evangelical theology affirms penal substitution as the central explanation of the atonement. The Son accomplishes redemption by satisfying divine justice while extending covenant grace.
Titles and Roles of the Son
Scripture assigns numerous titles to Jesus, each illuminating aspects of His identity. The title Messiah identifies Him as the anointed fulfillment of covenant promise. The title Son of Man connects Him to Daniel’s vision of the eschatological ruler. The designation Lamb of God reveals His sacrificial mission.
Vine’s Expository Dictionary highlights the theological depth of these biblical terms and their Old Testament foundations. These titles are not honorary labels but doctrinal affirmations rooted in redemptive history. Each title reveals functional and ontological truths.
Christ is also described as the last Adam. This typology connects His obedience to the failure of the first Adam. Where Adam brought death, Christ brings life. The covenantal structure of Scripture converges in the Son, who fulfills the promises made to Abraham and David.
The Son Within the Trinity
The doctrine of the Son cannot be isolated from Trinitarian theology. Boyce situates Christology within the eternal relations of the Trinity. The Son is eternally begotten of the Father, not created, and shares the same divine essence. Personal distinction does not imply ontological inferiority.
The New Testament reveals relational order without diminishing equality. The Son submits to the Father in the economy of redemption, yet He remains fully divine. This functional subordination reflects mission, not essence. The triune relations provide the theological framework for understanding incarnation and redemption.
Evangelical theology rejects both modalism and subordinationism. The Son is neither a temporary manifestation nor a lesser deity. He is consubstantial with the Father and the Spirit. The unity of essence and distinction of persons define orthodox Christology.
The Second Coming and Consummation
Christology extends beyond the first advent to the promised return of Christ. Scripture anticipates a visible, bodily return in glory. While interpretive differences exist within Evangelicalism, the bodily return of Christ remains a core confession.
The second coming reveals the fullness of Christ’s kingship. He will judge the living and the dead. He will consummate the kingdom and restore creation. Eschatology is therefore inseparable from Christology.
The doctrine of the Son concludes in worship. The incarnate, crucified, risen, and returning Christ is the object of faith and obedience. Evangelical theology affirms that all of redemptive history centers upon Him. The church proclaims not abstract doctrine but the living Son of God.
Conclusion
The doctrine of the Son forms the heart of Christian theology. Christology integrates revelation, incarnation, atonement, resurrection, and consummation into a unified confession. The Son is fully God and fully man, one person in two natures. He accomplishes salvation through His substitutionary death and victorious resurrection. He reigns presently at the Father’s right hand and will return in glory.
Evangelical theology insists that Christology must arise from faithful exegesis and doctrinal synthesis. The authority of Scripture governs every affirmation. The mission of the church flows from the identity of the Son. Because Jesus Christ is Lord, the church proclaims His gospel to all nations. The doctrine of the Son is therefore not only theological truth but the foundation of global mission.
Sources
Boyce, J. P. (1887). Abstract of systematic theology. Christian Classics Ethereal Library.
Geisler, N. L. (1999). Baker encyclopedia of Christian apologetics. Baker Books.
Scofield, C. I. (1917). Scofield reference Bible notes.
Smith, K. G. How to do an exegetical study.
Torrey, R. A. What the Bible teaches.
Vine, W. E. (1940). Complete expository dictionary of Old and New Testament words.
