The doctrine of the sufficiency of Scripture affirms that the written Word of God is entirely adequate for all matters of faith and practice, providing the divine information necessary for salvation (2 Tim 3:15; John 3:16), spiritual growth (1 Pet 2:2), and righteous living (2 Tim 3:16-17; 2 Pet 1:3). Paul wrote, “all Scripture is inspired by God and profitable for teaching, for reproof, for correction, for training in righteousness, so that the man of God may be adequate, equipped for every good work” (2 Tim 3:16-17). To say that all Scripture is inspired by God affirms its divine origin and authority. It is profitable for teaching truth, exposing error, correcting wrong, and training in righteousness (2 Tim 3:16), with the goal of making the child of God spiritually competent, fully equipped for every good work that honors the Lord (2 Tim 3:17). No other source of revelation is needed to meet the believer’s spiritual needs, for God has already disclosed His will sufficiently in the sixty-six canonical books. This sufficiency does not imply that Scripture answers every curiosity of human inquiry, but rather that it provides the full counsel of God necessary for knowing Him, serving Him, and walking faithfully in the world.