Barnabas's condescension toward Mark may have arisen from the special gentleness of his Christian character. Or it may have come from the first stirrings of love for a relative, not yet fully overcome by the power of the Christian spirit.
That such human relations could still exert considerable influence on Barnabas is shown by his conduct in Antioch in the presence of Peter and Paul (Gal 2).
However it may have been, this momentary disagreement became the occasion for a division between two men who until then had acted together in the service of the Lord.
The result of the division between Paul and Barnabas was that a new sphere of activity was added for the sake of the Gospel. From that time, Barnabas formed a defined sphere for himself. He went first with Mark to his homeland, Cyprus, and then probably to other places for preaching.
That Barnabas was not inactive in spreading Christianity can be inferred not only from his former activity. It is also proved by the fact that Paul, long after this event, points to him as a man known for his ceaseless activity in preaching the Gospel (1 Cor 9:6).
Paul's severity toward Mark could also have been useful for Mark himself. It had to bring him to consciousness of his fault, and later he showed himself faithful to his calling.
Finally, this division was only temporary. Later we see Paul, Barnabas, and Mark again closely united among themselves, though from this time Barnabas seems to have had a separate and independent sphere of activity.
In his place, Paul took as his companion Silas, or Silvanus, who had been sent from the Church of Jerusalem to Antioch with the epistle.