What does it mean to transgress the doctrine of Christ?

Transgressing the doctrine of Christ involves stepping beyond the boundaries set by God's Word regarding salvation and the nature of Jesus. This can manifest in adding human works to grace as a requirement for salvation, which fundamentally distorts the gospel message. John warns that such transgressions reveal a failure to truly know God, as they undermine the completeness of Christ's work. Upholding the pure doctrine of Christ is crucial for maintaining the integrity of our faith and fellowship with God, as any deviation risks leading oneself or others away from salvation and relationship with Him.