What does the Bible say about being added to the church?

Acts 2:47 teaches us that being added to the church is the Lord's sovereign work, showing that those who are added are not merely joining an organization but are being united to Christ's body, which is the true church. This emphasizes that salvation is the Lord's doing, as He chooses His elect for salvation and adds them to the church daily. It reflects God's powerful grace where He calls individuals to Himself, resulting in their conversion and incorporation into the fellowship of believers.