How does the birth of Jesus demonstrate God's plan of salvation?

The birth of Jesus is a central element in God's redemptive plan as foretold by prophets and seen in the Scriptures. In Matthew 1:21, it explicitly states that 'He shall save His people from their sins,' indicating that His incarnation was purposefully designed for salvation. This is further illuminated by the fact that He was born of a virgin, emphasizing His divine nature alongside His human nature. Such an event illustrates God's faithfulness in fulfilling promises made throughout the Old Testament, particularly in the context of deliverance from sin and the establishment of a new covenant, showcasing the depths of His grace and mercy for His chosen people.