The Mystery of Prayer and concentration. (Acts 2:1-13) 1. They were people who had a reason for concentration. 1) Acts 1:1~8 (kingdom) 2) Acts 1:14 (assurance) 3) Acts 2:1~47 (promise) 2. Their focus of concentration were the people needing healing. (Acts 2:42) 1) Division - confusion 2) Obsession – different things 3) Addiction – incorrect things 3. There is a point for concentration. 1) Self (1) Acts 1:1~14 (2) Acts 2:1~47 (3) Galatians 2:20 2) The world and the field (1) Acts 13:1~4 (2) Acts 16:6~10 (3) Acts 19:1~7 3) Spiritual world (Philippians 3:1~21)