Why is sound doctrine significant for Christians?

Sound doctrine is essential for the believer's life as it provides the truth that undergirds faith and practice. In 2 Timothy 3:16-17, scripture is described as profitable for teaching, which is foundational for spiritual growth and understanding. It equips believers to discern truth from error and promotes a correct understanding of salvation through faith in Christ. Consequently, adhering to sound doctrine leads to righteousness and equips the believer for good works in the service of God.