All my fountain are in you

Psalm 87:1-7
He has set his foundation on the holy mountain.
The Lord loves the gates of Zion more than all the dwelling of Jacob- Israel.
Glorious things are said of you, O city of God.
Egyptian, Babylon, Philistia and Tyre will say, "This one was born in Zion."  All are includes as citizens.
Zion will be said,"This one and that one were born in her and the Most high himself will establish her."
The Lord will write in the register of the peoples:"This one was born in Zion."
They will sing "All my fountain are in you."
Why?
City of God: Zion: Jerusalem's temple hill. Be the focus and the capital of the nations
This festival psalm looks forward to the glorious future God has planned for his holy city.
The Old Testament sees this triumph largely i material and geographical term, the New  in spiritual.
How?
Everyone of us, his people, will be registered in the holy city- Zion. Rejoice!
Born in Zion- belong to the Lord; He gives us the fountain of life.