John Chrysostom

Thus, since it was natural for them to be greatly irritated against these persons, for it was they who had come and showed him all about the division, inasmuch as by them also they had written the questions about the virgins, and about the married persons:-mark how he softened them down; both in the beginning of his Epistle by saying, "For it hath been signified unto me by them which are of the house of Chloe;" thus at once concealing these and bringing forward the others: (for it should seem that the latter had given their …

Homily on 1 Corinthians 44 ↗

Theophylact of Ohrid

They reported to Paul the news about the divisions and other failings in Corinth. Perhaps it was through them that the members of Chloe's household informed him (1 Cor. 1:11). Since it was natural that the Corinthians would become embittered against them, he restrains them by saying that they "supplied what was lacking on your part," that is, they came in place of all of you, and for your sake undertook such a journey to me.

Commentary on 1 Corinthians ↗

Thomas Aquinas

He instructs them here as to those who are pre-eminent in ministry, and it can be expounded in two ways. In one way, so that it would say, I rejoice at the coming of Stephanus and Fortunatus and Achaicus, who are present to you, whose presence is advantageous to you. Because they have made up for your absence, by teaching you. And in this too they refreshed my spirit, insofar as I rejoice at your good; and your spirit as well, inasmuch as you are instructed: "I rejoice in the Lord greatly" (Phil. 4:10). …

Commentary on 1 Corinthians ↗