How do we know that God adds to the church?

The assurance that God adds to the church is found in Acts 2:47, which clearly indicates that it is the Lord who does this work. The passage provides insight into the early church's practices and the resulting fruit of their community life. They dedicated themselves to the apostles' teaching, fellowship, breaking of bread, and prayer, which highlights how God's work through the Spirit accompanies genuine worship and teaching. This highlights the sovereignty of God in the church's growth, as He orchestrates the salvation of individuals whom He has called to Himself.