The book opens telling of the forty days after the [[Resurrection]] of [[Christ]], during which He appeared to the Apostles, "speaking the things concerning the Kingdom of God".<ref>Acts 1:3</ref> The promise of the Holy Spirit and the Ascension of Christ are then noted. Peter advises that a successor be chosen in the place of [[Judas Iscariot]], and Matthias is chosen by lot. | The book opens telling of the forty days after the [[Resurrection]] of [[Christ]], during which He appeared to the Apostles, "speaking the things concerning the Kingdom of God".<ref>Acts 1:3</ref> The promise of the Holy Spirit and the Ascension of Christ are then noted. Peter advises that a successor be chosen in the place of [[Judas Iscariot]], and Matthias is chosen by lot. |