Regeneration and Assurance of Salvation in the New Testament

The concept of regeneration is closely tied to the idea of salvation in the New Testament. Regeneration refers to the spiritual rebirth that occurs when an individual becomes a follower of Jesus Christ. This concept is rooted in various biblical passages, including Titus 3:5, which states that God "saved us through the washing of rebirth and renewal by the Holy Spirit" ^[7].

The New Testament teaches that regeneration is a work of God, accomplished through the death and resurrection of Jesus Christ. In Ephesians 2:5, believers are described as being "made alive with Christ," indicating a spiritual resurrection that occurs in conjunction with Christ's own resurrection ^[6]. This new life is characterized by a transformation from a state of spiritual death to one of life, as believers are "created anew in Christ Jesus" (Ephesians 2:10) ^[8].

Assurance of salvation is closely linked to regeneration, as it is the confidence that one has been saved through faith in Jesus Christ. The New Testament provides various grounds for assurance, including the work of the Holy Spirit, who testifies to believers' adoption as children of God (Romans 8:16) ^[3]. The resurrection of Jesus Christ is also seen as a guarantee of salvation, as it demonstrates God's power to raise the dead and gives believers confidence in their own future resurrection (1 Corinthians 15:12-14) ^[2].

The book of Hebrews emphasizes the importance of holding fast to one's faith in order to attain assurance. Hebrews 10:22 encourages believers to draw near to God with a sincere heart, "in full assurance of faith" ^[1]. This full assurance is rooted in the knowledge that Christ is the mediator of a new covenant, which provides forgiveness of sins and an eternal inheritance for those who are called (Hebrews 9:15) ^{[4, 13]}.

The Presbyterian interpretation of Ephesians 5:20 highlights the importance of gratitude in the life of a believer, as they give thanks to God the Father through Jesus Christ for all things, including blessings and adversities ^[10]. This attitude of gratitude is seen as a key aspect of the Christian life, as believers recognize that all things work together for their good (Romans 8:28).

In the New Testament, salvation is often described as a future event that believers will experience when Jesus returns in glory (Romans 13:11) ^[11]. This future aspect of salvation is also emphasized in 1 Peter 1:5, which states that believers are "shielded by God's power until the coming of the salvation that is ready to be revealed in the last time" ^[12]. The assurance of this future salvation is rooted in the believer's union with Christ, who has already been raised from the dead and is now seated at the right hand of God (Ephesians 2:6) ^[9].

The concept of regeneration and assurance of salvation is also linked to the idea of the new covenant, which is described in Hebrews 9:15 as a covenant that provides forgiveness of sins and an eternal inheritance for those who are called. This new covenant is seen as a fulfillment of Old Testament prophecies, such as Isaiah 45:17, which promises that Israel will be saved by Yahweh with an everlasting salvation ^[5].

The New Testament teaches that regeneration and assurance of salvation are closely tied to the work of the Holy Spirit, who brings about a new birth and renewal in believers (Titus 3:5) ^[7]. This work of the Spirit is seen as a guarantee of the believer's future salvation, as they are "sealed with the promised Holy Spirit" (Ephesians 1:13). The Spirit's presence in the believer's life is a source of confidence and assurance, as they know that they are children of God and heirs of eternal life.

Sources

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: Resurrection, The — A doctrine of the Old Testament -- Job 19:26; Ps 16:10; 49:15; Isa 26:19; Da 12:2; Ho 13:14. A first principle of the gospel -- 1Co 15:13,14; Heb 6:1,2. Expected by the Jews -- Joh 11:24; Heb 11:35. Denied by the Sadducees -- Mt 22:23; Lu 20:27; Ac 23:8. Explained away by false teachers -- 2Ti 2:18. Called in question by some in the church -- 1Co 15:12. Is not incredible -- Mr 12:24; Ac 26:8. Is not contrary to reason -- Joh 12:24; 1Co 15:35-49. Assumed and proved by our Lord -- Mt 22:29-32; Lu 14:14; Joh 5:28,29. Preached by the Apostles -- Ac 4:”
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 ”
Hebrews “Hebrews 9:15 (Geneva1599) — And for this cause is he the Mediatour of the newe Testament, that through death which was for the redemption of the transgressions that were in the former Testament, they which were called, might receiue the promise of eternall inheritance.”
Isaiah “Israel will be saved by Yahweh with an everlasting salvation. You will not be disappointed nor confounded to ages everlasting. -- Isaiah 45:17”
Ephesians (Protestant academic) “Tyndale House on Ephesians 2:5: 2:5 gave us life when he raised Christ from the dead (literally made us alive together with Christ): Joined with Christ, believers share in his resurrection, now and in the future (see 2:6; Rom 6:4-14; Col 3:1-4). • It is only by God’s grace that you have been saved: See Eph 1:2; 2:8-9.”
Titus (Protestant academic) “Tyndale House on Titus 3:5: 3:5 not because . . . but because: The contrast is between human actions that might be thought to merit salvation and God’s grace (see Gal 2:16). Salvation is through faith in God’s mercy alone (Eph 2:8). • He washed away our sins, giving us a new birth: See Ezek 16:9; John 3:1-15; Eph 5:26; Heb 10:22; 2 Pet 1:9. • and new life through the Holy Spirit: This signifies a complete departure from the life of sin and death and a transfer into the realm of life and purity (see also Rom 12:2; 2 Cor 5:17; Col 3:10).”
Ephesians (Protestant academic) “Tyndale House on Ephesians 2:10: 2:10 He has created us anew in Christ Jesus, so we can do the good things he planned for us: Good works are the result, not the cause, of salvation. God’s Spirit, working through a transformed heart, produces a good life (Gal 5:22-23).”
Ephesians (Protestant academic) “Tyndale House on Ephesians 2:6: 2:6 united with Christ Jesus: Because of this union, believers share God’s glory and blessings, and experience resurrection both now and in the future (see Rom 6:4-14; Col 2:12-13; 3:1-4).”
Ephesians (Presbyterian) “Jamieson, Fausset & Brown on Ephesians 5:20: thanks . . . for all things--even for adversities; also for blessings, unknown as well as known (Col 3:17; Th1 5:18). unto God and the Father--the Fountain of every blessing in Creation, Providence, Election, and Redemption. Lord Jesus Christ--by whom all things, even distresses, become ours (Rom 8:35, Rom 8:37; Co1 3:20-23).”
Romans (Protestant academic) “Tyndale House on Romans 13:11: 13:11 The New Testament often speaks of salvation as the final victory over sin and death that believers will experience when Jesus returns in glory (see 5:9-10).”
1 Peter (Protestant academic) “Tyndale House on 1 Peter 1:5: 1:5 until you receive this salvation: In the New Testament, salvation often refers to final rescue from sin and death at the time of Christ’s return. This hope encourages believers to persevere to the end (see also 1:9, 10; 2:2; 4:18). • ready to be revealed: The future revealing of God’s salvation contrasts with the present hiddenness of God and his purposes (see also 1:7, 13).”
Hebrews (Presbyterian) “Jamieson, Fausset & Brown on Hebrews 9:15: for this cause--Because of the all-cleansing power of His blood, this fits Him to be Mediator (Heb 8:6, ensuring to both parties, God and us, the ratification) of the new covenant, which secures both forgiveness for the sins not covered by the former imperfect covenant or testament, and also an eternal inheritance to the called. by means of death--rather, as Greek, "death having taken place." At the moment that His death took place, the necessary effect is, "the called receive the (fulfilment of the) promise" (so Luk 24:49 uses "promise"; Heb 6:15; ”

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