This Bible study diligently tackles the widely debated “Once Saved, Always Saved” (OSAS) doctrine, also known as “Eternal Security” or “The Perseverance of the Saints.” From a traditional Roman Catholic perspective, the study argues that OSAS fundamentally denies the existence and destructive power of mortal sin. It challenges the notion that one’s salvation is an irreversible act, irrespective of subsequent grave actions, by robustly presenting the Church’s consistent teaching on the necessity of perseverance in grace.
The core of the study reasserts the Catholic understanding of mortal sin: a grave, knowing, and willing offense that severs our living relationship with God and kills the life of grace within us. Citing both Scripture (1 John 5:16-17) and the Catechism (CCC 1857, 1855), it meticulously defines the three conditions for a sin to be mortal. Crucially, it highlights that following mortal sin, mere prayer is insufficient; true repentance and the Sacrament of Confession are necessary to restore God’s life of grace.
The study systematically refutes common scriptural appeals used by OSAS proponents (e.g., Romans 8:35, 8:1, John 10:28-29), offering deeper, contextual Catholic interpretations. It emphasizes passages like John 15 (the vine and branches) and 1 John 2:3 (“if we keep his commandments”), which clearly indicate that maintaining a state of grace requires active cooperation with God and perseverance. The practical application is a profound call for Catholic faithful to live in vigilant awareness of their spiritual state, to actively strive for holiness, to avoid the sin of presumption, and to faithfully utilize the Sacrament of Confession for reconciliation and spiritual renewal, ensuring they “remain in Christ” until the end.
Download the full Bible study: 📄 Mortal Sin, Grace, and the Danger of “Once Saved, Always Saved” (PDF)