How do we know salvation is eternal and secure?

Salvation is described in the Scriptures as an everlasting work of God, founded on His immutable nature. In John 10:28-29, Jesus declares, 'I give unto them eternal life; they shall never perish,' emphasizing that true believers are held securely in Christ’s hands. The doctrine of eternal security asserts that because salvation is initiated and sealed by divine grace, it cannot be lost. The Holy Spirit not only regenerates believers but also preserves them in faith until the day of redemption, as stated in Philippians 1:6. This work of God ensures that those whom He has elected and called are kept safe for eternity, further grounded in the unchanging character of God Himself.