Summary of 1 John 5:13-21 - Assurance and Eternal Life

Assurance and Eternal Life in 1 John 5:13-21

1 John 5:13 states, "I write these things to you who believe in the name of the Son of God so that you may know that you have eternal life" ^[1]. This verse is part of a larger passage that emphasizes the assurance of eternal life for believers.

The passage begins by affirming that God has given believers eternal life, and this life is found in His Son (1 John 5:11) ^{[1, 2]}. Eternal life is a central theme in John's writings, described as a present reality that believers experience through their union with Christ ^[3]. According to John Calvin, eternal life is not just a future promise but a current reality that begins in this life and is consummated in the next ^[13].

The literary context of 1 John 5:13-21 is a conclusion to the epistle, where the author reiterates the importance of believing in Jesus Christ and the assurance that comes with it. The surrounding verses discuss the confidence believers have in prayer (1 John 5:14-15) and the distinction between sin that leads to death and sin that does not (1 John 5:16-17) ^{[6, 7]}.

The historical setting of 1 John is generally understood to be in the late first century, with the audience being early Christian communities facing various challenges, including false teachings ^[11]. The author of 1 John emphasizes the importance of abiding in Christ and the Father, promising that those who do so will have eternal life (1 John 2:24-25) ^[8].

Key terms in this passage include "eternal life" (ζωὴ αἰώνιος, zōē aiōnios), which is a life that is characterized by its quality and duration, and "assurance" (πληροφορία, plērophoria), which refers to the full confidence or certainty that believers have in their salvation ^{[4, 5]}.

The major exegetical decision in this passage revolves around the interpretation of "sin unto death" (1 John 5:16-17). Different traditions have understood this phrase in various ways. Some, like the Puritan commentator Matthew Henry, interpret it as a reference to a specific sin that leads to spiritual death, while others see it as a more general reference to persistent, unrepentant sin ^[11].

The range of interpretations on 1 John 5:13-21 is broad. The verse is seen as a source of comfort and assurance for believers across various Christian traditions. For example, John Gill, a Baptist/Reformed commentator, emphasizes the gift of eternal life as a present possession of believers, while Adam Clarke, a Methodist/Wesleyan commentator, highlights the importance of continuing in communion with the Father and the Son to enjoy this life ^{[9, 10]}.

In tradition, 1 John 5:13-21 has been used to affirm the doctrine of assurance, emphasizing that believers can have confidence in their salvation. The passage has also been seen as a call to perseverance and faithfulness, warning against the dangers of sin and apostasy. The early church father Augustine interpreted eternal life as both a gift and a reward, underscoring the gracious nature of God's salvation ^[12].

The passage continues to function in Christian liturgy and practice, with its themes of assurance and eternal life being central to many Christian denominations' teachings on salvation. The emphasis on knowing one has eternal life provides a foundation for Christian confidence and hope.

The assurance of eternal life is not just a future expectation but a present reality that shapes the lives of believers. As the passage concludes, it notes that believers are born of God and that the Son of God has come to give them understanding to know Him who is true (1 John 5:20) ^[1]. This knowledge is at the heart of the Christian faith, providing a deep and abiding assurance that is rooted in the person and work of Jesus Christ.

Sources

1 John “The testimony is this, that God gave to us eternal life, and this life is in his Son. -- 1 John 5:11”
I John “I John 5:11 (BSB) — And this is that testimony: God has given us eternal life, and this life is in His Son.”
1 John “This is the promise which he promised us, the eternal life. -- 1 John 2:25”
Easton's Bible Dictionary “Easton's Bible Dictionary: Eternal life — This expression occurs in the Old Testament only in Dan. 12:2 (R.V., "everlasting life"). It occurs frequently in the New Testament (Matt. 7:14; 18:8, 9; Luke 10:28; comp. 18:18). It comprises the whole future of the redeemed (Luke 16:9), and is opposed to "eternal punishment" (Matt. 19:29; 25:46). It is the final reward and glory into which the children of God enter (1 Tim. 6:12, 19; Rom. 6:22; Gal. 6:8; 1 Tim. 1:16; Rom. 5:21); their Sabbath of rest (Heb. 4:9; comp. 12:22). The newness of life which the believer derives from Christ (Rom. 6:4) is the ”
Easton's Bible Dictionary “Easton's Bible Dictionary: Assurance — The resurrection of Jesus (Acts 17:31) is the "assurance" (Gr. pistis, generally rendered "faith") or pledge God has given that his revelation is true and worthy of acceptance. The "full assurance [Gr. plerophoria, full bearing'] of faith" (Heb. 10:22) is a fulness of faith in God which leaves no room for doubt. The "full assurance of understanding" (Col. 2:2) is an entire unwavering conviction of the truth of the declarations of Scripture, a joyful steadfastness on the part of any one of conviction that he has grasped the very truth. The "full assurance ”
OpenBible.info “Cross-reference: Ps.5.1 → 1John.5.14-1John.5.15 (confidence: 13 votes)”
OpenBible.info “Cross-reference: Ps.20.4 → 1John.5.14-1John.5.15 (confidence: 11 votes)”
1 John (Presbyterian) “Jamieson, Fausset & Brown on 1 John 2:25: this is the promise--Eternal life shall be the permanent consummation of thus abiding in the Son and in the Father (Jo1 2:24). he--Greek, "Himself," Christ, "the Son" (compare Jo1 1:1). promised-- (Joh 3:15, Joh 3:36; Joh 6:40, Joh 6:47, Joh 6:57; Joh 17:2-3).”
1 John (Baptist/Reformed) “John Gill on 1 John 5:11: And this is the record,.... The sum and substance of it, with respect to the person of Christ, and the security of salvation in him, who is the true God, and eternal life: that God hath given to us eternal life; which is a life of glory and happiness hereafter; in the present state is unseen, but will in the world to come be a life of vision, free from all the sorrows and imperfections of this; and will be of the utmost perfection and pleasure, and for ever. This is a pure free grace gift of God the Father, proceeding from his sovereigns good will and pleasure, and ”
1 John (Methodist/Wesleyan) “Adam Clarke on 1 John 2:25: This is the promise - God has promised eternal life to all who believe on Christ Jesus. So they who receive his doctrine, and continue in communion with the Father and the Son, shall have this eternal life.”
1 John (Nonconformist/Puritan) “Matthew Henry on 1 John 5 (introduction): In this chapter the apostle asserts, I. The dignity of believers (Jo1 5:1). II. Their obligation to love, and the trial of it (Jo1 5:1-3). III. Their victory (Jo1 5:4, Jo1 5:5). IV. The credibility and confirmation of their faith (Jo1 5:6-10). V. The advantage of their faith in eternal life (Jo1 5:11-13). VI. The audience of their prayers, unless for those who have sinned unto death (Jo1 5:14-17). VII. The preservation from sin and Satan (Jo1 5:18). VIII. Their happy distinction from the world (Jo1 5:19). IX. Their true knowledge of God (Jo1 5:20), upo”
Schaff ANF/NPNF (Patristic) “NPNF1 Vol 5: Augustine — Anti-Pelagian — CHAP. 20.--THE QUESTION ANSWERED. JUSTIFICATION IS GRACE SIMPLY AND ENTIRELY, ETERNAL LIFE IS REWARD AND GRACE. (part 2): is nothing else than God's grace, so also the eternal life which is the recompense of a good life is the grace of God; moreover it is given gratuitously, even as that is given gratuitously to which it is given. But that to which it is given is solely and simply grace; this therefore is also that which is given to it, because it is its reward;--grace is for grace, as if remuneration for righteousness; in order that it may be true, bec”
CCEL (Reformed) “John Calvin, Institutes of the Christian Religion, section 73: “in the world to come eternal life,” ( Mark 10:30 ), and elsewhere, “Come, ye blessed of my Father, inherit the kingdom,” &c. ( Mt. 25:34 ). For this reasons also, Paul gives the name of adoption to that revelation of adoption which shall be made at the resurrection; and which adoption he afterwards interprets to mean, the redemption of our body ( Rom. 8:23 ). But, otherwise, as alienation from God is eternal death,—so when man is received into favor by God that he may enjoy communion with him and become one with him, he passes fro”

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