2Cor 1:1

“"Paul an Apostle of Jesus Christ through the will of God, and Timothy our brother." In the first Epistle he promised he would send him; and charged them, saying, "Now if Timothy come, see that he be with you without fear." How then is it that he associates him here in the outset with himself? After he had been amongst them, agreeably to that promise of his teacher, "I have sent unto you Timothy who shall put you in remembrance of my ways which be in Christ," and had set everything in order, he had returned back to Paul; who on sending him, had said, "Set him forward on his journey in peace that he may come to me, for I expect him with the brethren." Since then Timothy was restored to his teacher, and after having with him set in order the things in Asia, had crossed again into Macedonia; Paul not unreasonably associates him hereafter as abiding with himself. For then he wrote from Asia, but now from Macedonia. Moreover, thus associating him he at once gains increased respect for him, and displays his own exceeding humility: for Timothy was very inferior to himself, yet doth love bring all things together. Whence also he everywhere makes him equal with himself; at one time saying, "as a child serveth a father so he served with me;" at another, "for he worketh the work of the Lord, as I also do;" and here, he even calleth him, "brother;" by all making him an object of respect to the Corinthians amongst whom he had been, as I have said, and given proof of his worth. "To the Church of God which is at Corinth." Again he calleth them "the Church," to bring and bind them all together in one. For it could not be one Church, while those within her were sundered and stood apart. "With all the saints which are in the whole of Achaia." In thus saluting all through the Epistle addressed to the Corinthians, he would at once honor these, and bring together the whole nation. But he calls them "saints," thereby implying that if any be an impure person, he hath no share in this salutation. But why, writing to the mother city, does he address all through her, since he doth not so everywhere? For instance, in his Epistle to the Thessalonians he addressed not the Macedonians also; and in like manner in that to the Ephesians he doth not include all Asia; neither was that to the Romans written to those also who dwell in Italy. But in this Epistle he doth so; and in that to the Galatians. For there also he writeth not to one city, or two, or three, but to all who are scattered every where.”

“People ask why it is that Paul puts his own name first, when the normal custom in letters is to put the name of the addressee at the beginning. The reason for this is that he is an apostle who is writing to those who are accountable to him. This is why he adopts the custom of secular judges, who do the same thing when they write to those over whom they exercise authority. Note too that he did not say "Paul and Timothy," because they were not both apostles. But in writing to the Philippians Paul did say that, because it was not so necessary for him to stress his authority in that case..”

“Since the apostle, in his first epistle, sent Timothy to Corinth and then received him back again when he returned, he rightly joins his name to his own. Moreover, Timothy had shown the Corinthians proof of his virtue as well. Thus, the apostle mentions Timothy in the present epistle as a person already known to the Corinthians and who had corrected many things among them. Notice that sometimes he calls him a son: "as a son with a father," he says, "he served with me in the gospel" (Phil. 2:22), sometimes a fellow worker: "for he does the work of the Lord, as I also do" (1 Cor. 16:10), and now a brother, presenting him as worthy of respect in every regard. Again he unites them, having said "church"; for those who are in division do not constitute a church. He mentions all those living in Achaia, showing preference to the Corinthians by greeting everyone through the epistle addressed to them, and at the same time calling the whole people to concord. Moreover, since they were all wavering, he offers them a common remedy; he does the same thing in the epistles to the Galatians and to the Hebrews. And by calling them saints, he shows that if anyone is impure, he is unworthy of this greeting and designation.”

“In this epistle to the Corinthians, the Apostle treats of these ministers and points out their dignity: first, he gives his greeting; secondly, he begins his message (v. 3). In the greeting he does three things: first, he mentions the persons who send the greeting; secondly, those who are greeted; thirdly, the good things he wishes them. In regard to the first he does two things: first, he mentions the principal person who sends the greeting, namely Paul; secondly, his companion, Timothy. The person who sends the greeting is described by his humility, because it is Paul, which in Latin means 'humble'. He is that humble person of whom it is said in Is. (60:22): "The least one shall become a clan, and the smallest one a mighty nation." Or by his doctrine, because Paul is called the mouth of the trumpet. This is the trumpet mentioned in Zechariah (9:14): "The Lord God will sound the trumpet, and march forth in the whirlwinds of the south." He fits what is said in Isaiah (58:1): "Lift up your voice like a trumpet." By the authority of his dignity, because he says, an apostle of Jesus Christ. Here he mentions three things: first, that he is a representative; hence, he is called an apostle, i.e., principally sent, for only twelve apostles were sent by Christ: "He chose from them twelve, whom he named apostles" (Lk. 6:13). But the other disciples were not sent principally, but secondarily. That is why the apostles are succeeded by bishops, who have a special care of the Lord's flock; but other priests succeed the seventy-two disciples and perform duties committed to them by the bishops. His dignity, therefore, is that he is an apostle: "If to others I am not an apostle, at least I am to you" (1 Cor. 9:2); "He who worked through Peter for the ministry to the circumcised worked through me also for the Gentiles" (Gal. 2:8). But why does he call himself an apostle, whereas in the epistle to the Romans he calls himself a servant. The reason for this is that he rebuked the Romans for quarreling and for pride, which is the mother of quarrels, because there are always disputes among the proud. Hence to cure them of quarreling he leads them to humility by calling himself a servant. But the Corinthians were obstinate and rebellious; so in order to curb their boldness, he uses a dignified name here, calling himself an apostle. Secondly, he mentions the one he represents, Jesus Christ: "We are ambassadors for Christ" (2 Cor. 5:20). Thirdly, he mentions how he obtained his ambassadorship, because he is not coming as a false apostle: "I did not send them and they ran" (Jer. 23:21), nor was he given to the people in God's anger in the sense of Job (34:30): "Who makes a hypocrite to reign"; "I have given you kings, but in my anger" (Hos. 13:11). But he obtained apostleship by God's will and pleasure: "He is a chosen instrument of mine" (Ac. 9:15). Therefore he says, by the will of God. The other person is Timothy; hence he says, and Timothy our brother. A brother, I say, because of the faith: "You are all brothers" (Matt. 23:8), and because of his dignity, for he was a bishop. This is why the Pope calls all bishops brothers. He mentions Timothy because, since he had visited them, as he said in the first epistle (ch. 16), the people might believe that he had maliciously reported to the Apostle the things he is writing to them. Then he mentions the persons greeted: first, the principal ones; secondly, those associated with the principal ones. He says, to the church of God, which includes all believers, both the clergy and the laity: "That you may know how one ought to behave" (1 Tim. 3:15); which is at Corinth, because Corinth was the chief city of Achaia. But those associated with the principal ones are all the saints who are reborn by the grace of the one Holy Spirit: "But you were washed, you were sanctified, in the Spirit of our God" (1 Cor. 6:11); who are in Achaia, whose chief city is Corinth.”

“Freed from all anxiety about the Corinthians, Paul confidently declares that he is an apostle of the Lord. In the first letter he said that he was "called an apostle," though he was not approved of by those who had been lured away from his teaching. In order to affirm that his apostleship has been ratified, he adds that he has been made an apostle by the will of God. He writes in association with Timothy, from whom he has heard the good news of the changes which have taken place at Corinth, and he associates the people there with believers in other churches, in order to confirm to them that they have made progress.”