John Chrysostom

"And there are diversities of workings, but the same God who worketh all things in all." "And what," saith one, "is a working?" and what "a gift?" and what "a ministration?" They are mere differences of names, since the things are the same. For what "a gift" is, that is "a ministration," that he calls "an operation" also. …

Homily on 1 Corinthians 29 ↗

Theophylact of Ohrid

Here He mentioned also the Father, Who produces operations in all believers. And behold for you the perfect Trinity. Now the gift, and the operation, and the ministry are one and the same thing, although they differ in names: for they are equally given by the Spirit, and by the Son, and by the Father. Notice also that he mentioned the Spirit first, and the Father last: this is for the sake of those who are too particular about order.

Commentary on 1 Corinthians ↗

Hilary of Poitiers

For the Apostle goes on to say, Now there are diversities of gifts, but there is the same Spirit; and there are diversities of ministrations but one and the same Lord; and there are diversities of workings but the same God, Who worketh all things in all. But to each one is given the manifestation of the Spirit for that which profiteth. …

On The Trinity 8.29 ↗

Thomas Aquinas

Then he mentions the distinctions of operations, saying: and there are varieties of working, by which one works the good in himself as by services to his neighbor; "Man goes forth to his work" (Ps 104:23), namely, proper to himself: "He distinguished them and appointed their different ways," i.e., operations (Sir 33:11). All of which come from one source. Hence he adds: But it is the same God who works all, as the first cause creating all actions. …

Commentary on 1 Corinthians ↗