And all this took place to fulfill what was spoken by the Lord through the prophet Isaiah.
This verse shows that Jesus’ birth was not a random event, but God’s plan promised beforehand, proclaimed through the prophecy of the prophet Isaiah (Isaiah 7:14). The evangelist emphasizes that Christ’s birth, by the fulfillment of prophecies, confirms the infallibility of God’s word: the Lord had spoken, and that word was fulfilled. Thus, the Gospel presents Jesus’ coming as the fulfillment of prophecy, uniting the Old and New Covenants into one history of salvation.