We know salvation is eternal because it is a gift from God, secured in Christ, and evidenced by His promises (Hebrews 6:19).
The assurance of eternal salvation comes from the nature of God's grace and the efficacy of Christ's redemptive work. Scripture clearly states that salvation is a work of God, not contingent upon human effort, as indicated in Ephesians 2:8-9. This gift is irrevocable, and believers are provided with concrete promises that God will not abandon those He has redeemed.
Furthermore, the Bible teaches that eternal life is rooted in a relationship with Christ. As believers are in union with Him, they share in the security of His eternal life. In Hebrews 6:19, the author illustrates this security as an anchor for the soul, indicating that the hope found in Christ is steadfast and unshakeable, reinforcing that our salvation cannot be lost or diminished.
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