Theopedia

First Epistle of John

“I write these things to you who believe in the name of the Son of God that you may know that you have eternal life.”

— 1 John 5:13

Overview

First John is a general epistle of the New Testament, traditionally attributed to the apostle John. By the fourth century the church had grouped it, together with the other two Johannine letters, among the seven “Catholic Epistles.”1 Unlike Paul’s letters, it names neither its author nor a specific recipient church, and it reads less as a single sustained argument than as a series of recurring tests by which a reader can know whether they share genuine fellowship with God. The letter states its own purpose plainly: it was written so that those who believe in the Son of God “may know” that they have eternal life (1 John 5:13).

Author and Date

The letter’s own text never names its author. External evidence for the apostle John, son of Zebedee, goes back to the generation immediately after his death: Irenaeus and Clement of Alexandria both attribute at least 1 John to him, and most scholars agree that a single author wrote all three Johannine epistles.2 That external chain runs through named links. Papias, bishop of Hierapolis, was “a friend of Polycarp and … had heard the apostle John preach,” and Irenaeus was in turn “a disciple of Polycarp, who knew the apostle John personally,” a chain of custody Michael Kruger judges cannot be “dismissed lightly.”3 Some modern scholars propose a separate “John the Elder” as Papias’s source rather than the apostle, but Kruger notes that “Irenaeus’s acknowledgment that Papias heard from the apostle John in person” tells against that reading regardless of how Papias’s own wording is parsed.4

The letter’s apostolic authority was already assumed, not argued for, within a generation of its writing. Polycarp’s own letter to the Philippians treats language drawn from 1 John as settled apostolic teaching, warning that “everyone who does not confess that Jesus Christ has come in the flesh is antichrist,” language lifted directly from 1 John 4:2-3.5

Historical and Literary Context

The letter addresses a congregation, or group of congregations, that a faction had recently left. John writes of those who “went out from us, but they were not of us” (1 John 2:19), and warns repeatedly against people he calls antichrists and false prophets (1 John 2:18, 22; 4:1). Their error centered on the person of Christ: John makes confessing “that Jesus Christ has come in the flesh” the test that distinguishes the Spirit of God from every spirit that is not (1 John 4:2-3), and denounces “the one who denies that Jesus is the Christ” as the antichrist (1 John 2:22). Confessing Christ’s full humanity, not merely his deity, is what genuine faith requires. Charles Hodge reads this warning as belonging to an extended era rather than one isolated incident: John “tells us this ‘is the last time’ (1 John 2:18) in which many antichrists are to appear,” a period Hodge takes to run from Christ’s first advent to his second.6 Augustus Strong likewise treats 1 John 4:2’s confession that “Jesus Christ is come in the flesh” as the New Testament’s own guard against any doctrine of Christ that leaves his humanity incomplete or unreal, the same error the church would later name docetism.7 The letter’s opponents, on this reading, denied that the eternal Son had truly taken on human flesh, coupling that denial with indifference toward sin, the combination that John’s tests of light, love, obedience, and confession are each aimed against.

Structure

First John does not build a single linear argument the way Paul’s letters typically do. Its themes recur and interweave rather than advancing once and moving on, circling back to the same tests of genuine fellowship with God from different angles across the letter. Four such tests recur throughout:

  • Walking in the light rather than darkness, tied to confessing and forsaking sin honestly rather than claiming to be without it (1 John 1:5-2:11; 1:8-10).
  • Love for fellow believers, which John treats as evidence, not merely accompaniment, of new life in Christ (1 John 2:7-11; 3:11-18, 23; 4:7-21).
  • Obedience to God’s commands, the mark that distinguishes those who actually know God from those who only claim to (1 John 2:3-6; 3:4-10; 5:2-3).
  • Right belief about Christ, confessing him as the Christ who has come in the flesh, against those who deny it (1 John 2:22-23; 4:1-3; 5:1, 5).

The letter closes by returning to its stated purpose: assurance, for those who believe in the name of the Son of God, that they have eternal life (1 John 5:13).

Major Themes

Assurance of salvation

John states his purpose in writing directly: “I write these things to you who believe in the name of the Son of God that you may know that you have eternal life” (1 John 5:13). Charles Hodge reads the “anointing” believers receive from Christ (1 John 2:20, 27) as the Holy Spirit’s own inward testimony grounding that assurance, an “unction” that “secures the knowledge and conviction of the truth” and abides in believers, keeping them from apostasy.8 Herman Bavinck ties the same assurance to the doctrine of the saints’ perseverance, citing several passages from 1 John among the texts on which the Reformed tradition built that doctrine, and insists the perseverance itself “is not an activity of the human person but a gift from God.”9

Tests of genuine faith

John repeatedly measures a profession of faith against visible fruit rather than treating the profession alone as sufficient. Love for fellow believers functions as one such test: whoever does not love remains, on John’s own terms, in death rather than life (1 John 3:14). Obedience functions as another: John identifies keeping God’s commandments as the mark of those who truly know him (1 John 2:3-4). Right confession of Christ functions as a third, and the letter’s opponents fail it: denying that Jesus Christ has come in the flesh is, for John, the mark of a spirit that is not from God (1 John 4:2-3). Bavinck notes the same letter also guards against overcorrecting in the other direction, holding together the confession that “sin continues to cling to believers throughout their lives (1 John 1:8)” with the assurance that “the seed of God remains in them (1 John 3:9),” rather than letting either truth cancel the other.10

“God is love”

John states plainly that “God is love” (1 John 4:8), grounding the command to love one another in God’s own nature rather than in mere example. Bavinck affirms the same point, that God “not only loves but is himself love,” and that this love is “the foundation, source, and model of our love,” while cautioning against reading the statement as though love were the one attribute from which all of God’s other perfections must be derived.11 The same letter holds this love together with God’s justice: Christ is the “propitiation for our sins” (1 John 2:2; 4:10), and Bavinck reads this as bilateral, God himself being reconciled to sinners, not sinners reconciled to God alone.12 The extent of that propitiation, and the reading of “the whole world” in 1 John 2:2, is treated at length in 1 John 2:2.

Fellowship with the Father and the Son

John opens the letter by declaring what he and the other apostles have “seen and heard,” proclaiming it so that his readers too “may have fellowship with us,” a fellowship that is, he says, “with the Father and with his Son Jesus Christ” (1 John 1:3). The tests of light, love, obedience, and confession that structure the rest of the letter all serve this same end: they mark out what it looks like to walk in actual, not merely claimed, fellowship with God.

Related Doctrines

References

  1. Michael J. Kruger, Canon Revisited: Establishing the Origins and Authority of the New Testament Books (Wheaton, IL: Crossway, 2012), chap. 8, “Problem Books and Canonical Boundaries”: by the time of Eusebius in the fourth century, “2 and 3 John have found a firm home as part of the seven ‘Catholic Epistles.’” ↩

  2. Kruger, Canon Revisited, chap. 8: “Most scholars agree that a single author penned all three of the Johannine epistles … Given that Irenaeus (Haer. 3.16.18) and Clement of Alexandria (Strom. 2.15.66) attribute at least 1 John to John the son of Zebedee, there is solid external support for the traditional view that the apostle is the author of all three letters.” ↩

  3. Kruger, Canon Revisited, chap. 6. ↩

  4. Kruger, Canon Revisited, chap. 6. ↩

  5. Ronald E. Heine, Classical Christian Doctrine: Introducing the Essentials of the Ancient Faith (Grand Rapids: Baker Academic, 2013), 16-17, quoting Polycarp, To the Philippians 7. ↩

  6. Charles Hodge, “Second Advent,” in Systematic Theology, Volume III (New York: Charles Scribner and Company, 1873), 787-834, at 820. ↩

  7. Augustus Hopkins Strong, Systematic Theology: A Compendium and Commonplace-Book Designed for the Use of Theological Students, vol. 2 (Philadelphia: The Griffith & Rowland Press, 1907), on John 1:14 and 1 John 4:2. ↩

  8. Charles Hodge, “Chapter XVI. Faith,” in Systematic Theology, Volume III (New York: Charles Scribner and Company, 1873), 40-113, at 75-76. ↩

  9. Herman Bavinck, Reformed Dogmatics: Abridged in One Volume, ed. John Bolt (Grand Rapids: Baker Academic, 2011), chap. 20, “Justification, Sanctification, and Perseverance.” ↩

  10. Bavinck, Reformed Dogmatics, chap. 18, “Calling and Regeneration.” ↩

  11. Bavinck, Reformed Dogmatics, chap. 8, “The Living, Acting God”: “God not only loves but is himself love (1 John 4:8), and his love is the foundation, source, and model of our love (1 John 4:10-11),” adding, “We need to exercise caution here not to take the confession ‘God is love’ in an exclusive sense as though all the divine attributes radiate from the core essence of divine love.” ↩

  12. Bavinck, Reformed Dogmatics, chap. 16, “The Exalted Lord Christ.” ↩