Word is out that the Gentiles are becoming believers in Jesus Christ. This knowledge is bringing the Law-lovers (Judaizers or legalizers) out of the woodwork.
The Law-lovers insist that in order to be saved one must “do” something. Paul and Barnabas are undoubtedly arguing grace alone through faith alone.
Paul’s and Barnabas’s second missionary journey was ready to commence. A heated disagreement arose between Paul and Barnabas. The disagreement was so sharp, Paul parted company from Barnabas and he took Silas on the journey instead. Barnabas chose to take Mark with him and they left for Cyprus. It is interesting the only pair that is commended by the Church in Antioch is Paul and Silas. Could it be Barnabas was out of the will of God?
Yet, when Paul wrote to the Corinthians, he mentions Barnabas (1 Cor. 9:6), so evidently they were still working together in some way. Nonetheless, this is the last we hear of Barnabas in the book of Acts.
If there is ever any doubt of what a person must do to be saved, one need only read Acts 16:31. It is one of the clearest passages which answers the question, “What must I do to be saved?”
“And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.”