S – They had such a sharp disagreement that they parted company, and Barnabas took Mark with him and sailed off to Cyprus.

Acts 15:39 CSB

O – Commentary:

The argument became such a sharp disagreement (paroxysmos, “provoking, stirring up, arousing,” the root of the Eng. “paroxysm”) that they parted company. The Lord overruled in this dissension for through it two missionary journeys instead of one were formed—one to Cyprus with Barnabas and Mark, and the other to Syria and Cilicia and ultimately Europe with Paul and Silas. Probably both Paul and Barnabas were right in their assessments of Mark. It may have been too soon for Mark to venture out with such a pro-Gentile apostle as Paul, but Barnabas certainly and correctly saw good raw material in his cousin Mark (cf. Col. 4:10; 2 Tim. 4:11; Phile. 24; 1 Peter 5:13). Paul later spoke of Barnabas in positive terms (1 Cor. 9:6; Col. 4:10). The Apostle Paul owed much to Barnabas and it appears they remained friends despite their contention over Mark.

“Acts,” in The Bible Knowledge Commentary: An Exposition of the Scripture

A – There were two disagreements in this chapter.  The first settled in the Jewish Council and with great results.  This one between two leaders and also great results.  Even though they went separate ways, there was positive dialogue about the other later in the Bible.  Disagreements are going to happen.  In both, there was healthy communication, disagreement and here is the key – ongoing relationship. That is how you stay in unity when you are on opposite sides of a conflict.

R – Heavenly Father, you are the Holy and just.  Empower us to have healthy conflict with others.  We can disagree and still remain in relationship with others.  Even if boundaries need to be established, we can honor and value others in our relationships.