John Chrysostom
Further, teaching them that they must place the hope of salvation not in teachers, but in themselves, he says: "Watch, stand fast in the faith" (1 Cor 16:13). Not in outward wisdom, for in it one cannot stand firm without wavering, but in faith, in which one can stand firm.
"Be courageous, be strong. Let all that you do be done with love" (1 Cor 16:13-14). In these words he seems to offer exhortation, yet he is reproving them for carelessness. Therefore he says to them, "Watch," as to sleepers; "stand fast," as to those who waver; "be courageous, be strong," as to the fainthearted; "let all that you do be done with love," as to those lacking mutual concord.
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One word is directed against deceivers: "Watch, stand fast." Another is against offenders: "Be courageous." A third is against those who stir up discord and strife: "Let all that you do be done with love." This love is the bond of perfection, the root and source of blessings.
What then does "let all that you do be done with love" mean? Whether one reproves, rules, obeys, learns, or teaches, all must be done with love. All the evils mentioned came from neglecting it.
If love had not been neglected, they would not have become proud and said, "I am of Paul," and, "I am of Apollos" (1 Cor 1:12). If it had been among them, they would not have gone to law before outsiders, that is, before pagans. Better still, they would not have gone to law at all.
If it had been among them, the fornicator would not have lived with his father's wife. They would not have despised weak brethren, nor had divisions, nor vaunted themselves over spiritual gifts. Therefore he also says: "Let all that you do be done with love. I beseech you, brethren, you know the household of Stephanas, that it is the firstfruits of Achaia, and that they have devoted themselves to the service of the saints" (1 Cor 16:14-15).
At the beginning of the epistle he already mentioned this, when he said: "I also baptized the household of Stephanas" (1 Cor 1:16). Now he calls it the firstfruits not of Corinth only, but of all Greece. It is no small honor to be the first to come to Christ.
Therefore, in the Epistle to the Romans, when praising certain persons for this, he said: "who were in Christ before me" (Rom 16:7). Here he did not say, "they were the first to believe," but, "they are the firstfruits." He shows that together with faith they displayed an excellent life as its fruit, and proved worthy in every respect.
Indeed, the firstfruits must be better than the rest of which they are the firstfruits. Paul testified this concerning them by that very expression. As I said, they not only believed sincerely, but also showed great piety in deed, lofty virtue, and zeal in works of mercy.
He proves their reverence not only by this, but also by saying that the whole household was filled with piety. Their zeal for good works he shows in the words that follow: "they have devoted themselves to the service of the saints." Do you hear what praise he gives to hospitality? He did not say, "they serve," but, "they have devoted themselves to the service of the saints." They chose such a life for themselves forever, and this is their care.