Assurance of Eternal Life in Christian Theology
Eternal life, a concept frequently appearing in the New Testament, refers to the future state of the redeemed and stands in opposition to eternal punishment [1]. It is the ultimate reward and glory for God's children, characterized as a Sabbath of rest [1]. The Old Testament also alludes to this concept, notably in Daniel 12:2, and the doctrine of immortality is taught throughout the Old Testament, becoming more explicit in later books like Psalms and Isaiah [1, 5].
The New Testament further illuminates eternal life, with Jesus revealing it (John 6:68; 2 Timothy 1:10) and stating that knowing God and Christ is eternal life (John 17:3) [3, 9]. This life is a gift from God, given through Christ (Psalm 133:3; Romans 6:23; John 6:27) [3]. It is found in Christ (1 John 5:11) and is granted to those who believe in God and Christ (John 5:24; 3:15-16) [3]. The apostle John emphasizes that God has promised eternal life to all who believe in Jesus Christ, and those who abide in the Father and the Son will receive this life [7, 8].
Assurance, in a biblical sense, signifies a fullness of faith that leaves no room for doubt [2]. The resurrection of Jesus serves as God's pledge that His revelation is true [2]. This "full assurance of faith" (Hebrews 10:22) and "full assurance of understanding" (Colossians 2:2) imply an unwavering conviction in the truth of Scripture [2].
The assurance of eternal life is a privilege for believers [6]. It is produced by faith (Ephesians 3:12; 2 Timothy 1:12; Hebrews 10:22) and confirmed by love (1 John 3:14, 19; 4:18) [6]. This assurance is an effect of righteousness (Isaiah 32:17) and is abundant in the understanding of the Gospel (Colossians 2:2; 1 Thessalonians 1:5) [6]. Believers can have assurance of their election (Psalm 4:3; 1 Thessalonians 1:4), their redemption (Job 19:25), their adoption (Romans 8:16; 1 John 3:2), their salvation (Isaiah 12:2), and their eternal life (1 John 5:13) [6].
The apostle John explicitly states, "And this is the record, that God hath given to us eternal life: and this life is in his Son" (1 John 5:11) [12]. This means that whoever has the Son has life, and whoever does not have the Son of God does not have life (1 John 5:12) [13]. John Gill notes that Christ gives eternal life to His followers now, in the form of spiritual life, which culminates in eternal life. He gives Himself, who is "the true God and eternal life," and provides the knowledge of Himself, which is eternal life [10]. This eternal life is a free gift of God the Father, stemming from His sovereign will [12].
The hope of eternal life is a foundational aspect of the Gospel message, intended to bring souls to this hope [11]. It was "made certain before eternal time, by the word of God who is ever true" (Titus 1:2) [4]. The Lord preserves and keeps alive those who believe, ensuring their spiritual life is secure in Christ, so that because Christ lives, they shall live also and never experience the second death [14].
Sources
- 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 ”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Life, Eternal — Christ is -- 1Jo 1:2; 5:20. Revealed by Christ -- Joh 6:68; 2Ti 1:10. To know God and Christ is -- Joh 17:3. Given By God. -- Ps 133:3; Ro 6:23. By Christ. -- Joh 6:27; 10:28. In Christ. -- 1Jo 5:11. Through Christ. -- Ro 5:21; 6:23. To all given to Christ. -- Joh 17:2. To those who believe in God. -- Joh 5:24. To those who believe in Christ. -- Joh 3:15,16; 6:40,47. To those who hate life for Christ. -- Joh 12:25. In answer to prayer. -- Ps 21:4. Revealed in the Scriptures -- Joh 5:39. Results from Drinking the water of life. -- Joh 4:14. Eating the ”
- Titus “Titus 1:2 (BBE) — In the hope of eternal life, which was made certain before eternal time, by the word of God who is ever true;”
- Easton's Bible Dictionary “Easton's Bible Dictionary: Immortality — Perpetuity of existence. The doctrine of immortality is taught in the Old Testament. It is plainly implied in the writings of Moses (Gen. 5:22, 24; 25:8; 37:35; 47:9; 49:29, comp. Heb. 11:13-16; Ex. 3:6, comp. Matt. 22:23). It is more clearly and fully taught in the later books (Isa. 14:9; Ps. 17:15; 49:15; 73:24). It was thus a doctrine obviously well known to the Jews. With the full revelation of the gospel this doctrine was "brought to light" (2 Tim. 1:10; 1 Cor. 15; 2 Cor. 5:1-6; 1 Thess. 4:13-18).”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Assurance — Produced by faith -- Eph 3:12; 2Ti 1:12; Heb 10:22. Made full by hope -- Heb 6:11,19. Confirmed by love -- 1Jo 3:14,19; 4:18. Is the effect of righteousness -- Isa 32:17. Is abundant in the understanding of the gospel -- Col 2:2; 1Th 1:5. Saints privileged to have, of Their election. -- Ps 4:3; 1Th 1:4. Their redemption. -- Job 19:25. Their adoption. -- Ro 8:16; 1Jo 3:2. Their salvation. -- Isa 12:2. Eternal life. -- 1Jo 5:13. The unalienable love of God. -- Ro 8:38,39. Union with God and Christ. -- 1Co 6:15; 2Co 13:5; Eph 5:30; 1Jo 2:5; 4:13. Peace with ”
- 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 (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).”
- John (Methodist/Wesleyan) “Adam Clarke on John 17:3: This is life eternal - The salvation purchased by Christ, and given to them who believe, is called life: 1. Because the life of man was forfeited to Divine justice; and the sacrifice of Christ redeemed him from that death to which he was exposed. 2. Because the souls of men were dead in trespasses and sins; and Christ quickens them by his word and Spirit. 3. Because men who are not saved by the grace of Christ do not live, they only exist, no good purpose of life being answered by them. But when they receive this salvation they live - answer all the Divine purposes, a”
- John (Baptist/Reformed) “John Gill on John 10:28: And I give unto them eternal life,.... Christ gives eternal life to his sheep, or people now; he gives them a spiritual life, or a life of grace, which issues in eternal life; he gives them himself, who is the true God and eternal life, and whoever has him has life; he gives them the knowledge of himself, which is life eternal; and he gives them his righteousness, which is their justification of life, or what entitles them to eternal life; and he gives them the foretastes of it, in faith and hope, in the enjoyment of himself, and the discoveries of his love; he gives t”
- Titus (Baptist/Reformed) “John Gill on Titus 1:2: In hope of eternal life,.... Or "for the hope of eternal life"; in order to bring souls to the hope of it. This is another end of the Gospel ministry, as to bring God's elect to faith in Christ, and to the knowledge and acknowledgement of the truth, as it is in Jesus, so to the hope of eternal glory and happiness: in a state of nature, they are without the grace of hope, or any true ground and foundation of it; and though it is the gift of God's grace, and is implanted on the soul by the Spirit of God in regeneration; yet the Gospel is the means of producing it at first”
- 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 (Presbyterian) “Jamieson, Fausset & Brown on 1 John 5:12: the Son . . . life--Greek, "THE life." BENGEL remarks, The verse has two clauses: in the former the Son is mentioned without the addition "of God," for believers know the Son: in the second clause the addition "of God" is made, that unbelievers may know thereby what a serious thing it is not to have Him. In the former clause "has" bears the emphasis; in the second, life. To have the Son is to be able to say as the bride, "I am my Beloved's, and my Beloved is mine" [Sol 6:3]. Faith is the mean whereby the regenerate HAVE Christ as a present possession, ”
- Psalms (Baptist/Reformed) “John Gill on Psalms 41:2: The Lord will preserve him and keep him alive,.... Amidst a thousand deaths, to which he is exposed for making a profession of his faith in Christ; see Co2 1:10; or this may refer to his spiritual life, which is hid and preserved in Christ, in whom he believes; and is safe and secure; because Christ lives he shall live also, and shall never die the second death, nor be hurt by it, but shall have everlasting life; and he shall be blessed upon the earth; with temporal blessings; for whatever he has, be it more or less, he has it with the blessing of God, and as a bles”