In Psalm 40:6–8, David speaks of a servant who delights to do God’s will, not merely offering sacrifices but giving wholehearted obedience. Yet David himself could never fully live up to those words. In Hebrews 10, the Holy Spirit reveals their true fulfillment in Jesus Christ. The One who entered the world saying, “Behold, I have come to do Your will, O God.”

This sermon traces the movement from Psalm 40 to Hebrews 10, showing how Christ came not only to die for our sins, but to live the perfectly obedient life we could never live. Through His active obedience and His once-for-all sacrificial death, Jesus provides everything God requires for our salvation.

Christmas, then, is the beginning of Christ’s mission of obedience. Obedience that leads from the cradle to the cross, and from the cross to a finished work that secures forgiveness, righteousness, and peace with God for all who trust in Him.