How do we know that sound doctrine is important for believers?

Sound doctrine is vital for believers because it establishes the framework within which Christians understand their faith, worship, and ethical living. This is particularly highlighted in Romans 6:17, where obedience to the heart's doctrine is crucial for righteousness. Without a correct understanding of scripture, believers may stray into false teachings that lead to moral failures. Adhering to sound doctrine ensures that believers live lives that reflect God’s glory and are in alignment with His will, as immorality and confusion often stem from a lack of solid biblical grounding.