1 Corinthians 3:5

Here the apostle instructs them how to cure this humour, and rectify what was amiss among them upon this head, I. By reminding them that the ministers about whom they contended were but ministers: Who then is Paul, and who is Apollos, but ministers by whom you believed? Even as the Lord gave to every man, Co1 3:5. They are but ministers, mere instruments used by the God of all grace. Some of the factious people in Corinth seem to have made more of them, as if they were lords of their faith, authors of their religion. Note, We should take care not to deify ministers, nor put them into the place of God. Apostles were not the authors of our faith and religion, though they were authorized and qualified to reveal and propagate it. They acted in this office as God gave to every man. Observe, All the gifts and powers that even apostles discovered and exerted in the work of the ministry were from God. They were intended to manifest their mission and doctrine to be divine. It was perfectly wrong, upon their account, to transfer that regard to the apostles which was solely to be paid to the divine authority by which they acted, and to God, from whom they had their authority. Paul had planted and Apollos had watered, Co1 3:6. Both were useful, one for one purpose, the other for another.

— Matthew Henry's Concise Commentary (public domain)

Who then--Seeing then that ye severally strive so for your favorite teachers, "Who is (of what intrinsic power and dignity) Paul?" If so great an apostle reasons so of himself, how much more does humility, rather than self-seeking, become ordinary ministers! Paul . . . Apollos--The oldest manuscripts read in the reverse order, "Apollos," &c. Paul." He puts Apollos before himself in humility. but ministers, &c.--The oldest manuscripts have no "but." "Who is Apollos . . . Paul? (mere) ministers (a lowly word appropriate here, servants), by whom (not "in whom"; by whose ministrations) ye believed." as . . . Lord gave to every man--that is, to the several hearers, for it was GOD that "gave the increase" (Co1 3:6).

— Jamieson-Fausset-Brown Commentary (public domain)