Though the Roman Catholic Church claims to uphold the grace of God in salvation, its official doctrines—particularly regarding justification, authority, the papacy, purgatory, the sacraments, priesthood, and Marian devotion—introduce theological errors that fundamentally distort the gospel message, adding human works, tradition, and ecclesiastical authority to what Scripture declares is received by grace alone through faith alone in Christ alone (Rom 3:28; Gal 2:16; Eph 2:8-9).