The sermon centers on 2 Timothy 3:16–17, affirming the Bible as the sole authoritative and trustworthy guide for Christian life due to its divine authorship, comprehensive usefulness, and ultimate purpose. It emphasizes that Scripture is God-breathed, not merely human-written, with God as the ultimate author who sovereignly guided its composition through the Holy Spirit. The text highlights Scripture's multifaceted role in teaching, rebuking, correcting, and training believers in righteousness—not to earn salvation, but to live out the righteousness already granted through Christ. The ultimate goal of Scripture is to equip and complete the believer for every good work, especially in times of moral decline and personal challenge. The preacher applies this truth to church leadership and the entire congregation, urging a daily, devoted reliance on Scripture as the supreme standard for faith, practice, and spiritual growth, rejecting all human alternatives as insufficient or conflicting.