https://www.mljtrust.org/sermons-online/psalms-73-24/perseverance-of-the-saints/

If it was God’s grace that saves humanity, will it not be God’s grace that keeps His people? This message is good news for the backslider. In this sermon on the perseverance of the saints from Psalm 73:24, Dr. Martyn Lloyd-Jones highlights the grace of God in the believer’s future salvation. This doctrine, known as the perseverance of the saints, belongs at the bedrock of the faith. Dr. Lloyd-Jones begins with a proper understanding of God’s grace. God’s grace saves, restrains, and restores. The backsliding Christian will be restored because God is a God of grace. His grace is the reason all Christians are, remain, and we will be saved. Nothing, therefore, can separate the believer from God’s love. First, this doctrine is rooted in God’s own character. When God starts a work, He completes it. One finds His rest in this unchangeable person of God. The true believer cannot slide too far from God’s saving grace because God’s work of redemption doesn’t change. Second, this doctrine stems from God’s purpose. God has intended to save humanity from their sin for God’s own glory. Since saving them from sin is God’s purpose, the weak Christian will indeed be saved. Finally, this doctrine rests in the power of God. Listen and know that God not only desires His children to be saved, but He has the ability to save.