Immanuel
God had promised Adam and Eve that one of their heirs would finally be able to break the curse of sin. Luke tells how God revealed to Mary that she would give birth to that heir. Jesus, the Son of God, would be her son. Mary believes and willingly offers herself to God.
Betrothal in the ancient world was part of a two-stage marriage process. The initial phase, the betrothal, involved a formal, witnessed agreement to marry and the giving of a bridal price (Mal 2:14; m. Ketubot 4:4–5).
At this point the bride legally became the groom’s and could be called his wife. About a year later the actual marriage followed, and the husband took his wife home. In the first century betrothal could take place starting at the age of twelve. Mary’s age is unstated. It is during this betrothal stage that Gabriel breaks the news.
1. God sends an angel to tell Mary His plan.
The mighty work God has done in John the Baptist’s conception would be surpassed by an even greater miracle in the virginal conception of Jesus, God’s Son. The mighty work God foretold he would do through John the Baptist’s ministry would be surpassed by an even greater work through his Son’s ministry. Whereas John would be “great in the sight of the Lord” (1:15), Jesus would be great without qualification (1:32) and would be called the Son of God (1:35).