And we have sent with him the brother
The Syriac and Ethiopic versions read, "our brother"; and one of Stephens's copies, "your brother": who this brother was, is not certain; some think it was Luke the evangelist, the companion of the apostle in his travels:
whose praise is in the Gospel, throughout all the churches;
being known and highly commended by all the churches, for the Gospel he wrote; but it is not certain that Luke as yet had wrote his Gospel; and much less that it was so much known at present among the churches; and besides, this brother's praise seems to be on account of his preaching the Gospel, and not writing one: others think Barnabas is intended, who was chosen and sent out by the churches along with the apostle; but these in a short time separated from each other, nor do we read of their coming together again: others are of opinion, that Apollos is designed, who was a very eloquent preacher, and of whom the apostle had given the Corinthians an intimation in his former epistle, that he would come to them at a convenient time; but to him is objected, that he never was chosen of the churches, to travel with the apostle on such an account as here mentioned: others would have it that Silas or Silvanus is meant, who was a very constant companion of the apostle, and of whom he makes mention in most of his epistles; and others have made no doubt of it, but John Mark is here meant, who not only wrote a Gospel, but was an excellent preacher of it, and was chosen by the churches to go along with Paul and Barnabas; and though there was some distaste taken to him by Paul, he was afterwards reconciled to him, and for his profitableness in the ministry was greatly desired by him; but after all, it is difficult to determine who it was, nor is it of any great moment: a "brother" he was; being not only a regenerate person, but a preacher of the Gospel; a brother in the ministry, and "one whose praise was in the Gospel"; greatly admired, and much commended, for his excellent talent in preaching the Gospel; and for this he was famous "throughout all the churches"; a very great commendation indeed; but this is not all, it follows,