Bede : There was, however, discord. Do not think this a sin. For it is not wrong to be troubled, but to be troubled irrationally, without any just cause. — Commentary on Acts Bede : And Barnabas took Mark and sailed to Cyprus. For the brother he loved and who was related to him (for they are said to have been cousins), Barnabas, separated from Paul, returned to his native island, and nonetheless carried out the evangelical work commanded to him. — Commentary on Acts John Chrysostom : "And how is it not amiss, that upon so small a matter there should arise so great an evil?" In the first place then, no evil did come of it, if, sufficing each for whole nations, they were divided the one from the other, but a great good. And besides, they would not readily have chosen to leave each other. But admire, I pray you, the writer, how he does not conceal this either. "But at any rate," say you, "if they must needs part, let it be without exasperation." Nay, but if nothing more, observe this, that in this too is shown what was of man (in the preaching of the Gospel). For if the like behooved to be shown (even) in what Christ did, much more here. — Homily on Acts 34 John Chrysostom : The point to be considered, is not that they differed in their opinions, but that they accommodated themselves the one to the other (seeing), that thus it was a greater good their being parted: and the matter took a pretext from this. What then? did they withdraw in enmity? God forbid! In fact you see after this Barnabas receiving many encomiums from Paul in the Epistles. There was "sharp contention," it says, not enmity nor quarrelling. The contention availed so far as to part them. And with reason: for what each supposed to be profitable, he did not forego thereafter, because of the fellowship with the other. Nay, it seems to me that the parting took place advisedly, and that they said one to another "As I wish not, and thou wishest, therefore that we may not fight, let us distribute the places." So that in fact they did this, altogether yielding each to the other: for Barnabas wished Paul's plan to stand, therefore withdrew; on the other hand, Paul wished the other's plan to stand, therefore he withdrew. — Homily on Acts 34 John Chrysostom : Would to God we too made such separations, as to go forth for preaching. A wonderful man this is; and exceedingly great! To Mark this contest was exceedingly beneficial. For the awe inspired by Paul converted him, while the kindness of Barnabas caused that he was not left behind: so that they contend indeed, but the gain comes to one and the same end. For indeed, seeing Paul choosing to leave him, he would be exceedingly awed, and would condemn himself, and seeing Barnabas so taking his part, he would love him exceedingly: and so the disciple was corrected by the contention of the teachers: so far was he from being offended thereby. — Homily on Acts 34 John Chrysostom : This happens even in the case where God and men are the parties: the man requests, God is wroth. For instance, when He saith, "If her father had spit in her face": and again, "Let me alone, and in Mine anger I will blot out this people." And Samuel when he mourns for Saul. For by both, great good is done. Thus also here: the one is wroth, the other not so. The same happens also in matters where we are concerned. And the sharp contention with good reason, that Mark may receive a lesson, and the affair may not seem mere stage-playing. For it is not to be thought that he who bids, "Let not the sun go down upon your wrath," would have been wroth because of such a matter as this: nor that he who on all occasions gave way would not have given way here, he who so greatly loved Paul that before this he sought him in Tarsus, and brought him to the Apostles, and undertook the alms in common with him, and in common the business relating to the decree. — Homily on Acts 34 Oecumenius : "A sharp disagreement," he said, "arose," nor a love of conflict. Yet the sharp disagreement was such that it separated them from one another; and with the highest righteousness, which each considered to be beneficial, he later confirmed this by an act of sharing toward him. [CHRYSOSTOM] — Commentary on Acts Oecumenius : It seems reasonable that the separation arose from mutual understanding, and to say to one another that "Since I wish it and you do not, so that we do not quarrel, let us divide the regions." Therefore they entirely yielded to one another in this. For Barnabas wished that Paul should remain, and therefore he departed. Yet we also find this among the prophets: different dispositions and different temperaments, as Elijah is severe, Moses gentle, so likewise here Paul is the more intense of the two compared to Barnabas. This battle was very beneficial to Mark. For it turned back Paul's harshness, and made Barnabas kind so that he would no longer be abandoned. Therefore they fight, but in the end increase is accomplished. For seeing Paul lifted up to depart, he became very afraid and condemned himself, and seeing Barnabas therefore opposing him, he would very much love him. And the student was corrected through the struggle of the teachers, so that he kept far from being scandalized. For when he saw himself therefore cast out because of his idleness by Paul, he hurried with zeal on the second course to cover up his former annoyance, greatly benefited by Paul's correctness. What then? Did the enemies withdraw? By no means! That there was not hostility toward the apostles is shown everywhere afterward by Barnabas enjoying many praises from Paul in his letters. [CHRYSOSTOM] — Commentary on Acts