"...He (Jesus) appeared to them over a period of forty days and spoke about the Kingdom of God." (1:3). "...you will be my witnesses...to the ends of the earth." (1:8). Then he ascended into heaven (1:9+). "He must remain in heaven until the time comes for God to restore everything, as he promised long ago through his holy prophets." (3:21).
Review of Old Testament events in chapter 7. A review of Old Testament and Gospels 13:17-52. God calls all people 10:34-11:26, 15:7-35.
Conversion of Paul (Saul) 9:1-19+, 22:3-21 and chapter 26.
"...From morning till evening he (Paul) explained and declared to them the kingdom of God and tried to convince them about Jesus from the Law of Moses and from the Prophets." (28:23).