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

Sound doctrine is essential for Christians because it serves as the backbone of genuine faith and understanding. Without it, believers risk falling prey to errant teachings and experiences that contradict the essential truths of Scripture. In a culture rife with confusion and diverse teachings, the absence of distinct beliefs leads to a 'jelly-fish Christianity,' characterized by instability and lack of conviction. The warnings in Galatians 1:6-9 highlight the danger of turning to a different gospel and underscore the necessity of adhering to sound teaching that is firmly rooted in biblical truth.