John Calvin Reformed @genevareformer

3. To their power, and even beyond their power. When he says that they were willing of themselves, he means that they were, of their own accord, so well prepared for the duty, that they needed no exhortation. It was a great thing — to strive up to the measure of their ability; and hence, to exert themselves beyond their ability, showed a rare, and truly admirable excellence.

Matthew Henry Presbyterian @wholebiblehenry

Observe here, I. The apostle takes occasion from the good example of the churches of Macedonia, that is, of Philippi, Thessalonica, Berea, and others in the region of Macedonia, to exhort the Corinthians and the Christians in Achaia to the good work of charity. And, 1. He acquaints them with their great liberality, which he calls the grace of God bestowed on the churches, Co2 8:1.

Commenting on 2 Corinthians 8:1-6

John Gill Reformed Baptist @doctorgill

For to their power, I bear record,.... They gave according to their ability, to the utmost of it, which is the most that can be desired, or be given; for no man can give more than he has, nor is he required to do more than he is able: yea, and beyond their power they were willing of themselves; not that they did or could...