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Nature of Eternal Life in Scripture and Theology

Eternal life, in biblical and theological contexts, refers to the perpetual existence and blessed state of the redeemed, often contrasted with eternal punishment [1]. While the concept of immortality is present in the Old Testament, implied in the writings of Moses (e.g., Genesis 5:22, 24) and more explicitly in later books like Isaiah and Psalms, it is fully "brought to light" in the New Testament through the revelation of the Gospel [2].

The term "eternal life" appears frequently in the New Testament (e.g., Matthew 7:14; Luke 10:28) and encompasses the entire future of those who are saved [1]. It is described as the final reward and glory that God's children will enter, a Sabbath of rest [1]. The newness of life that believers receive from Christ is also considered a form of eternal life [1]. The Scriptures reveal that eternal life is given by God and through Christ [5]. John 5:39 states, "You search the Scriptures, because you think that in them you have eternal life; and these are they which testify about me" [9].

The nature of eternal life is not merely endless duration but is intrinsically linked to a relationship with God and Christ. John 17:3 states that "to know God and Christ is" eternal life [5]. This life is "in Christ" (1 John 5:11) and comes through Him [5, 8]. Adam Clarke, in his commentary on 1 John 5:11, emphasizes that God has given believers "a right to endless glory, and a meetness for it," and this life is "in his Son," coming through Him as its author and purchaser [17]. Similarly, John Gill notes that Christ, as the "Word of life," is life itself and the source of all life, who was manifested in human nature [12].

Eternal life is often presented as a present possession for believers. Jamieson, Fausset & Brown, commenting on John 3:36, state that one "hath everlasting life" already [16]. This perspective suggests that eternal life begins at the point of faith, not merely after death. The Holy Spirit is described as God's guarantee of future blessings and a foretaste of eternal life and power, indicating that believers experience aspects of this life in the present [14].

The concept of "life" in Scripture can refer to physical life, immortality, conduct, spiritual life, or eternal life [3]. The "everlasting" nature of this life is underscored by the use of Greek words (aion, aionios, aidios) that also describe the eternal existence of God, Christ, and the Holy Spirit [4, 7]. This same terminology is used to describe the unending duration of the sufferings of the lost, referred to as "eternal death" or "eternal punishment" [4, 1].

The contrast between eternal life and eternal death is significant. Eternal life is the blessed state of the righteous, while eternal death is the miserable fate of the wicked in hell [1, 4]. Adam Clarke identifies three kinds of death—natural, spiritual, and eternal—and correspondingly, three kinds of life: natural, spiritual (union of God and soul), and eternal (communion of body and soul with God in the other world) [13].

The promise of eternal life is a central theme in the New Testament. 1 John 2:25 states, "this is the promise which he promised us, even eternal life" [11]. This promise is rooted in God's faithfulness, "which was made certain before eternal time, by the word of God who is ever true" (Titus 1:2) [10]. Believers are "born anew, not of mortal seed, but of immortal, by the word of God, who liveth and endureth for ever" (1 Peter 1:23, Geneva 1599) [6]. This new birth through God's immortal word ensures that the life received is eternal [15].

Sources

  1. 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 ”
  2. 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).”
  3. Easton's Bible Dictionary “Easton's Bible Dictionary: Life — Generally of physical life (Gen. 2:7; Luke 16:25, etc.); also used figuratively (1) for immortality (Heb. 7:16); (2) conduct or manner of life (Rom. 6:4); (3) spiritual life or salvation (John 3:16, 17, 18, 36); (4) eternal life (Matt. 19:16, 17; John 3:15); of God and Christ as the absolute source and cause of all life (John 1:4; 5:26, 39; 11:25; 12:50).”
  4. Easton's Bible Dictionary “Easton's Bible Dictionary: Eternal death — The miserable fate of the wicked in hell (Matt. 25:46; Mark 3:29; Heb. 6:2; 2 Thess. 1:9; Matt. 18:8; 25:41; Jude 1:7). The Scripture as clearly teaches the unending duration of the penal sufferings of the lost as the "everlasting life," the "eternal life" of the righteous. The same Greek words in the New Testament (aion, aionios, aidios) are used to express (1) the eternal existence of God (1 Tim. 1:17; Rom. 1:20; 16:26); (2) of Christ (Rev. 1:18); (3) of the Holy Ghost (Heb. 9:14); and (4) the eternal duration of the sufferings of the lost (Matt. 25”
  5. 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 ”
  6. I Peter “I Peter 1:23 (Geneva1599) — Being borne anewe, not of mortall seede, but of immortall, by the woorde of God, who liueth and endureth for euer.”
  7. Easton's Bible Dictionary “Easton's Bible Dictionary: Everlasting — Eternal, applied to God (Gen. 21:33; Deut. 33:27; Ps. 41:13; 90:2). We also read of the "everlasting hills" (Gen. 49:26); an "everlasting priesthood" (Ex. 40:15; Num. 25:13). (See [196]ETERNAL.)”
  8. I John “I John 5:11 (Geneva1599) — And this is that record, to wit, that God hath giuen vnto vs eternall life, and this life is in that his Sonne.”
  9. John ““You search the Scriptures, because you think that in them you have eternal life; and these are they which testify about me. -- John 5:39”
  10. 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;”
  11. 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).”
  12. 1 John (Baptist/Reformed) “John Gill on 1 John 1:2: For the life was manifested,.... That is, the Word of life, who is life itself, the fountain of life, having it as God, in and of himself, without derivation from, and independent of another, originally and eternally, and who is the cause, author, and giver of life in every sense to others; this living God, who from all eternity was invisible, was in the fulness of time manifested in human nature; see Joh 1:14. And we have seen it; as before with the eyes of their bodies: and bear witness; for they were both eye and ear witnesses of the Word, and of the truth of hi”
  13. John (Methodist/Wesleyan) “Adam Clarke on John 5:25: The dead shall hear the voice - Three kinds of death are mentioned in the Scriptures: natural, spiritual, and eternal. The first consists in the separation of the body and soul. The second in the separation of God and the soul. The third in the separation of body and soul from God in the other world. Answerable to these three kinds of death, there is a threefold life: Natural life, which consists in the union of the soul and body. Spiritual life, which consists in the union of God and the soul, by faith and love. Eternal life, which consist in the communion of the bod”
  14. Ephesians (Protestant academic) “Tyndale House on Ephesians 1:14: 1:14 The Spirit is both God’s guarantee of future blessings and a foretaste of eternal life and power. The believer’s eternal inheritance includes everything he promised (see also 1:18; Rom 8:17; 2 Cor 1:22; 5:5; Gal 3:29; 4:7; Col 1:12; 3:24; Titus 3:7).”
  15. 1 Peter (Presbyterian) “Jamieson, Fausset & Brown on 1 Peter 1:24: Scripture proof that the word of God lives for ever, in contrast to man's natural frailty. If ye were born again of flesh, corruptible seed, ye must also perish again as the grass; but now that from which you have derived life remains eternally, and so also will render you eternal. flesh--man in his mere earthly nature. as--omitted in some of the oldest manuscripts. of man--The oldest manuscripts read, "of it" (that is, of the flesh). "The glory" is the wisdom, strength, riches, learning, honor, beauty, art, virtue, and righteousness of the NATU”
  16. John (Presbyterian) “Jamieson, Fausset & Brown on John 3:36: hath everlasting life--already has it. (See on Joh 3:18 and Joh 5:24). shall not see life--The contrast here is striking: The one has already a life that will endure for ever--the other not only has it not now, but shall never have it--never see it. abideth on him--It was on Him before, and not being removed in the only possible way, by "believing on the Son," it necessarily remaineth on him! Note.--How flatly does this contradict the teaching of many in our day, that there neither was, nor is, anything in God against sinners which needed to be remov”
  17. 1 John (Methodist/Wesleyan) “Adam Clarke on 1 John 5:11: This is the record - The great truth to which the Spirit, the water, and the blood bear testimony. God hath given us eternal life - a right to endless glory, and a meetness for it. And this life is in his Son; it comes by and through him; he is its author and its purchaser; it is only in and through Him. No other scheme of salvation can be effectual; God has provided none other, and in such a case a man's invention must be vain.”
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