John Chrysostom

"And" this, "not as we hoped." This he says with reference both to the amount and to their afflictions. 'For we could never have hoped,' he says, 'that whilst in so great affliction and poverty, they would even have urged us and so greatly intreated us.' He showed also their carefulness of life in other respects, by saying, "But first they gave their own selves to the Lord, and to us by the will of God." 'For in everything their obedience was beyond our expectations; nor because they showed mercy did they neglect the other virtues,' …

Homily 16 on 2 Corinthians ↗

Theophylact of Ohrid

We did not expect that those in such poverty and such affliction would ask us to accept their service. Here he testifies to their other virtues as well. For they did not become puffed up from the fact that they gave alms, nor did they neglect other virtues, but they wholly gave themselves over to the Lord, wholly and undividedly inclined themselves to every God-pleasing work. …

Commentary on 2 Corinthians ↗

Thomas Aquinas

He also commends their generosity as to the order of giving, because they not only gave what they owned, but they first gave themselves. For this should be the order of giving, namely, that a man be first acceptable to God, for if a man is not pleasing to God, his gifts are not acceptable: "And the Lord had regard for Abel and his offering" (Gen. 4:4). …

Commentary on 2 Corinthians ↗