Sometimes the most difficult and significant tasks involve the simplest truths. For instance, every Christian should quickly learn that vengeance belongs unto the Lord. God confirms as much throughout scripture (Deuteronomy 32:35; Psalm 94:1; Romans 12:19; Hebrews 10:30). This should be understandable as only the Lord has all the necessary information to execute just vengeance 100 percent of the time. When man attempts to execute vengeance, he often does so out of an improper motive or without key information of the evil that appears to have been done. Furthermore, when a believer takes vengeance into his own hands, he robs the Lord of His right and responsibility to exact vengeance at the right time and in the right manner.
Paul and Barnabas functioned similar to pioneer church planters who travel into unreached areas with the gospel. As they traveled, they faithfully preached the gospel and started churches with the goal of returning later to strengthen the believers. As Paul and Barnabas were planning their return to these areas, a conflict arose between them concerning who would accompany them on their journey. Barnabas desired to take a young man named John Mark, but Paul adamantly refused. Mark had accompanied them on the first trip, but departed from them and “went not with them to the work.” Paul felt as though he could no longer depend upon John Mark because of his earlier failure. The contention was so strong that Paul and Barnabas parted company and went their own separate ways. This is a sad narrative should it end here; however, there is much more to the story. Praise God that Paul later remarked of John Mark that “he is profitable to me for the ministry” (2 Timothy 4:11).