Not that we are sufficient of ourselves to think anything as of ourselves; but our sufficiency is of God;
All Commentaries on 2 Corinthians 3:5 Go To 2 Corinthians 3
Fulgentius of Ruspe
AD 533
In this debt which you demand from us and you repay, do not doubt that I am assisted, so that God, who works in us both to will and to bring to completion the work of the good will, himself gives that I may worthily think and worthily speak. For in good thoughts, “Not that of ourselves we are qualified to take credit for anything as coming from us; rather our qualification comes from God.” And for this reason we do not fail for want because by a free gift our sufficiency is from him in whom there is no want. Just as he does not need our goods, so he always abounds in giving, nor does he become needy by giving who gives that by which he is always filled; nor is there any pleasing gift of thought, word or deed offered by us to him which he himself has not given with free kindness. Wherefore the holy giving of God is always free because no demand based on human merits has ever preceded, because even if a human being has any good merit, it comes from him from whom comes “every good and perfect gift.”