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).
Scripturally speaking, a vow involves a solemn promise made to another individual or to God Himself. In our passage, vow is used both as a verb and a noun. Vowing a vow is analogous to someone promising a promise. Men are to keep their word by keeping their promises; or, in other words, men are to be faithfully dependable. When a man makes a promise to God or to another person, he should do everything within his power to keep that promise. The Bible warns against a man allowing his mouth to cause his flesh to sin by making promises with no intention of keeping them. Those who vow a vow to the Lord and fail to perform it are called “fools” and the Lord “hath no pleasure in fools.” Before making any promise, one should first count the cost to determine whether or not making the vow will simply cause him to sin.
