Sent by the Holy Spirit!” Acts 13:2-3
 Luke recorded the words of Christ: “But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth.”

Acts 1:8 But how did the “witnesses… to the uttermost parts”, to the end of the earth, happen?
After the stoning of Stephen for his testimony that Christ was the Messiah, many followers of the Way left Jerusalem for safer location. Some moved to Antioch, Syria. Barnabus was sent by the Jerusalem church to care for them and many more people turned to the Lord. Barnabus then brought Paul to help and together they met and taught many people for a year. There in Antioch, the Holy Spirit called Barnabus and Paul for the work He had prepared for them to do and they left “to the uttermost parts.”