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
Nor can any human being be fit either for thinking or for doing anything good unless he is first helped by the free gift of divine assistance. “For God is the one who, for his own good purpose, works ‘in them’ both to desire and to work,” as the vessel of election [Paul] affirms; also by his teaching, we know that “we of ourselves are not qualified to take credit for anything as coming from us; rather our qualification comes from God.” Therefore, he supplies us with all the sufficiency of good, and his fullness is not lessened when he gives who kindly shares every good with us that we may have them… . Everything which is created, just as before it was created it did not exist, so before it receives was unable to possess; and just as it cannot subsist without the working of him who made it, so it is unable to will or to do good unless God continuously deigns to help. For from him is the beginning of a good will, from him the ability to do good works, from him perseverance in a good way of life, from him in the present age is given true humility of heart and in the future the happiness of eternal reward, that they may be without end happy who now without falsity are humble.