Gregory the Great — on Rom 12:16 (Forty Gospel Homilies, Homily 7)

“For knowledge is a virtue, but humility is the guardian of virtue. It remains therefore that in all that it knows the mind should humble itself, lest the wind of pride carry away what the virtue of knowledge has gathered. When you do good things, brothers, always recall to memory the evil things you have done, so that while fault is carefully observed, the mind may never carelessly rejoice in good work. Consider as your superiors one another, especially those who are not committed to your charge, your neighbors, because even those whom you see doing certain wicked things—you do not know what good things may lie hidden in them. Therefore let each one strive to be great, but yet in some way not know that he is, lest while he arrogantly attributes greatness to himself, he lose it. For hence it is said through the prophet: "Woe to you who are wise in your own eyes, and prudent before yourselves." Hence Paul says: "Be not wise in your own eyes." Hence against the proud Saul it is said: "When you were little in your own eyes, you were made head among the tribes of Israel." As if it were openly said: When you saw yourself as little, I made you great above others. But because you now see yourself as great, you are esteemed little by me. On the contrary, when David despised the power of his kingdom by dancing before the ark of the Lord's covenant, he said: "I will play and become more vile than I have become, and I will be humble in my own eyes." For whom would it not exalt to break the jaws of lions, to tear apart the arms of bears, to be chosen while his elder brothers were passed over, to be anointed to the governance of the kingdom when the previous king was rejected, to strike down Goliath—fearsome to all—with a single stone, to bring back the numerous foreskins proposed by the king after slaying the foreigners, to receive the kingdom by promise, and afterward to possess the entire Israelite people without any opposition? And yet in all these things he despises himself, who confesses that he is humble in his own eyes. If therefore holy men, even when they do mighty deeds, think lowly of themselves, what will those say in their own excuse who swell with pride without any virtuous work? But even if any good works are present, they are nothing unless they are seasoned with humility. For a wondrous deed accompanied by pride does not elevate but weighs down. For he who gathers virtues without humility carries dust in the wind; and from the very source whence he seems to carry something, he is more grievously blinded. In all things that you do, therefore, my brothers, hold fast to humility as the root of good work; and look not to those to whom you are already superior, but to those to whom you are still inferior, so that while you set before yourselves the examples of better persons, you may always be able to ascend to greater things through humility.”