How do we know that God’s salvation is forever?

Salvation is an act of God alone, as stated clearly in the sermon: 'Salvation is what God does.' Ecclesiastes 3:14 assures us that God's works cannot be added to or subtracted from, reaffirming that His act of salvation, rooted in His eternal decree, is irreversible. Hebrews 9:12 emphasizes the eternal nature of redemption, highlighting that Jesus obtained 'eternal redemption for us.' This ensures that once we are saved, our salvation is secure and everlasting, rooted in the unalterable nature of God Himself.