Why is understanding the doctrine of Christ essential for Christians?

The doctrine of Christ is foundational for Christian faith as it teaches that Christ is both God and man, and only through Him can salvation be attained. As articulated in the sermon, if Jesus were not God, there would be no hope for salvation. It is His perfect righteousness and finished work on the cross that provides justification for sinners. Therefore, understanding who Christ is and what He has accomplished is vital for recognizing the singularity of the gospel, which is not based on our works but solely on His grace.