What does the Bible say about the Lord building up His Church?

Psalm 102:16 emphasizes that God will indeed build up His Church, referred to as Zion. This assurance is rooted in the prophetic declaration that God will act in mercy and favor towards His people. Throughout Scripture, the building up of the Church is a recurring theme, highlighting God's covenant faithfulness and the promise of His glory manifesting through the Church. The certainty expressed in the text, 'when the Lord shall build up Zion,' speaks to the inevitable fulfillment of God's plan for His Church, wherein He continually adds to it, as seen during Pentecost with the three thousand souls.