“Shout and be glad, Daughter Zion. For I am coming, and I will live among you, declares the LORD.” (Zechariah 2:10)
Zechariah sees a man with a measuring line going to measure Jerusalem. An angel runs to meet him: run, tell that young man, Jerusalem will be a city without walls because of the great number of people and animals in it. And I myself will be a wall of fire around it, and I will be its glory within. Come! Come! Flee from the land of the north, declares the LORD, for I have scattered you to the four winds of heaven. Shout and be glad, Daughter Zion. For I am coming, and I will live among you, declares the LORD. Many nations will be joined with the LORD in that day and will become my people. And I will live among you.
The Catechism identifies the LORD's declaration I will live among you as the Old Testament anticipation of the Incarnation: the God who promises to dwell with his people fulfils the promise definitively in Jesus Christ (CCC 2143).
Brothers and sisters, I am coming, and I will live among you. The city without walls protected by a wall of fire, the many nations joined to the LORD's people: this is the community that the Incarnation inaugurated and the Church embodies. The God who promised to live among the restored Jerusalem came and pitched his tent among us. Emmanuel. Shout and be glad.
Lord God, you came and lived among us. Shout and be glad, Daughter Zion. Through Christ our Lord. Amen.