Why is orthodox doctrine important for Christians?

Orthodox doctrine is vital for Christians as it safeguards the integrity of the faith and ensures that believers uphold the true teachings of Scripture. The Apostle Paul underscores this importance in Titus 2:1, where he instructs Timothy to teach sound doctrine. When doctrine deviates from the truth, it leads to errors and, ultimately, heresies that can be detrimental to the church. Throughout church history, confirming and defending fundamental beliefs in areas like the nature of Christ, the efficacy of His atoning sacrifice, and the person of the Holy Spirit serve to unite believers and promote a sound understanding of salvation by grace. In upholding orthodox beliefs, Christians fulfill their calling to share the true gospel, which is rooted in the historic Christian faith.