I love when I see clear references to the Church in the Old Testament. There are so many different prophecies that may or may not be interpreted to be the Church, and then there are some that are obvious upon first reading. Take this section from Zechariah:
10 Rejoice and be glad, Daughter Zion,
because I am about to come and dwell among you, says the Lord.
11 Many nations will be joined to the Lord on that day.
They will become my people,
and I will dwell among you
so you will know that the Lord of heavenly forces sent me to you.”
Jesus, God the Son, dwelt among us. The Holy Spirit, the third Person of the Trinity, continues to dwell among us. The Church opened up the Covenant People of God to all nations, not just the descendants of Abraham, Isaac, and Jacob. This is a view of the restoration of Jerusalem and the Covenant People beyond the scope of what most Jewish people would have thought, and it is given around 500 years before Jesus was born.
I love how God prepares and foreshadows what he is going to do well in advance!