Why is sound doctrine essential for Christians?

Sound doctrine is essential for Christians because it forms the foundation of their faith, providing the necessary knowledge for understanding salvation and living righteously. In 2 Timothy 3:16-17, Paul underscores that all Scripture is profitable for teaching, rebuking, correcting, and training in righteousness, so that believers may be equipped for every good work. Moreover, sound doctrine protects believers from false teachings and leads them into a deeper relationship with Christ. The Apostle Paul warns that a time will come when people will not endure sound doctrine, but will turn to fables instead. Thus, adherence to sound doctrine is a safeguard against becoming misled in the faith.