1:8 Holy Spirit has come upon you. Jesus means that the Holy Spirit will show His control of their lives with visible manifestations: the blowing of a violent wind, the appearance of tongues of fire, and speaking in foreign languages (ch. 2).
my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth. The Book of Acts follows this strategy. The Jerusalem witness (ch. 2) gives in miniature form God’s worldwide ministry: the “Jews . . . from every nation” (2:5) who heard and believed carried the message far and wide. In the rest of Acts the gospel spreads to Jerusalem (3:1–8:1), to Judea and Samaria, up to Antioch of Syria (8:1–12:25), and to the ends of the earth (13:1–28:31).