Why bother to pray if God has already determined what He will do? Can we change God’s mind? Alistair Begg considers these questions as he examines the mystery, necessity, and activity of prayer. A powerful weapon in spiritual battles, prayer should be framed by the Word of God and prompted, enabled, and guided by the Holy Spirit. Not everyone is free to approach God as Father, though; to truly pray in the Spirit, we must first trust in the saving work of Christ.