John Chrysostom

"And may God, that is able, fulfill all grace towards you." By this prayer he takes out the way a thought which lay in wait against this liberality and which is now also an hinderance to many. For many persons are afraid to give alms, saying, 'Lest perchance I become poor,' 'lest perchance I need aid from others.' To do away with this fear then, he adds this prayer, saying, May "He make all grace abound towards you." Not merely fulfil, but "make it abound." And what is "make grace abound?" 'Fill you,' he means, 'with so great things, …

Homily 19 on 2 Corinthians ↗

Theophylact of Ohrid

With these words he refutes the reasoning that many have when they say: if I give too much, I am afraid of becoming poor myself. God, he says, is able to enrich you so much that you can abundantly accomplish every grace, that is, every act of charity. Therefore, give generously, so that your charity may ever increase more and more. Do you see? He does not ask for riches for them, but for sufficiency. …

Commentary on 2 Corinthians ↗

Thomas Aquinas

Here he gives the reason for the three ways of giving. In regard to this he does two things. First, he assigns the reason taken on their part; secondly, the reason taken on God's part (v. 11). In regard to the first he does two things. First, he gives the reason; secondly, he confirms it (v. 9). The reason is this: whoever gives something which is multiplied for him should give promptly, abundantly and cheerfully, just as when we see men sowing seed abundantly and promptly and cheerfully, because they gather it up again multiplied. …

Commentary on 2 Corinthians ↗