Rights of a Christian minister

Having asserted his apostolical authority, he proceeds to claim the rights belonging to his office, especially that of being maintained by it.

I. These he states, v. 3-6. "My answer to those that do examine me (that is, enquire into my authority, or the reasons of my conduct, if I am an apostle) is this: Have we not power to eat and drink (v. 4), or a right to maintenance? Have we not power to lead about a sister, a wife, as well as other apostles, and the brethren of the Lord, and Cephas; and, not only to be maintained ourselves, but have them maintained also?" Though Paul was at that time single, he had a right to take a wife when he pleased, and to lead her about with him, and expect a maintenance for her, as well as himself, from the churches. Perhaps Barnabas had a wife, as the other apostles certainly had, and led them about with them. For that a wife is here to be understood by the sister-woman-- adelphen gynaika, is plain from this, that it would have been utterly unfit for the apostles to have carried about women with them unless they were wives. The word implies that they had power over them, and could require their attendance on them, which none could have over any but wives or servants. Now the apostles, who worked for their bread, do not seem to have been in a capacity to buy or have servants to carry with them. Not to observe that it would have raised suspicion to have carried about even women-servants, and much more other women to whom they were not married, for which the apostles would never give any occasion. The apostle therefore plainly asserts he had a right to marry as well as other apostles, and claim a maintenance for his wife, nay, and his children too, if he had any, from the churches, without labouring with his own hands to procure it. Or I only and Barnabas, have not we power to for bear working? v. 6. In short, the apostle here claims a maintenance from the churches, both for him and his. This was due from them, and what he might claim.

(from Matthew Henry's Commentary)