God uses prayer to grow his church. Our Lord promised in Matthew 16:18 that he would build his church, and he is still building it. But how? The Book of Acts explains how—through God’s people in the power of the Holy Spirit. And what are God’s people called upon to do in the Spirit’s power to advance His church? Very simply—proclamation of the gospel and prayer. It is the second of these duties that we will note in Acts that God used to grow His Church.