Paul’s second missionary journey, which took place approximately A.D. 49-52, encompassed a much larger territory than his first expedition did. The initial purpose of Paul’s trip was to visit the believers in every city that he and Barnabas had previously preached the gospel in (Acts 15:36), but a conflict between Paul and Barnabas caused the two to go their separate ways. Luke’s description of the incident suggests that the leadership role had become an issue, and at that point, Paul was unwilling to follow Barnabas’ direction. Luke stated, “And Barnabas determined to take with them John, whose surname was Mark. But Paul thought not good to take him with them, who departed from them from Pamphylia, and went not with them to the work. And the contention was so sharp between them, that they departed asunder one from the other: and so Barnabas took Mark, and sailed unto Cyprus; and Paul chose Silas, and departed, being recommended by the brethren unto the grace of God.
The break up of Paul and Barnabas’ ministry partnership may have seemed like a problem at first, but it actually led to a much better outcome in the end. Because Mark was left behind, he joined up with Peter and eventually wrote the second book of the New Testament titled “The Gospel According to S. Mark.” It is likely that most, if not all of Mark’s factual data came directly from Peter who was a member of Jesus’ inner circle of friends, as well as, the primary leader of the church located in Jerusalem. Paul’s selection of Silas to travel with him may have been the reason why his second trip was much more aggressive than his first, covering approximately twice the amount of territory than his first missionary journey did (Paul’s Second Missionary Journey, p. 1588). When Paul and Silas arrived in Lystra, they were joined by Timothy, “the son of a certain woman, which was a Jewess, and believed; but his father was a Greek: which was well reported of by the brethren that were at Lystra and Iconium” (Acts:16:1-2).
The fourth person to join Paul’s missionary team was the author of the book of Acts, Luke. The transition in the language from they to we suggests that Luke joined Paul’s team in Troas. It says in Acts 16:8-10, “And they passing by Mysia came down to Troas. And a vision appeared to Paul in the night; There stood a man of Macedonia, and prayed him, saying, Come over into Macedonia, and help us. And after he had seen the vision, immediately we endeavored to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them.” Timothy and Luke were key members of Paul’s missionary team that stayed with him throughout the rest of his life. The final book Paul wrote, 2 Timothy was addressed to “my dearly beloved son” (2 Timothy 1:2) indicating Paul and Timothy developed a very close personal relationship. In that book, which was written while Paul was in prison waiting to be executed, Paul said, “Only Luke is with me” (2 Timothy 4:11), suggesting Luke was not only Paul’s partner in ministry, but a faithful companion until his death.