The interpretation timeline
2 Corinthians 8:17 Douay-Rheims

For indeed he accepted the exhortation; but being more careful, of his own will he went unto you.

A.D. 407 – 1871 6 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“Observe how he also represents him as fulfilling his own part, and needing no prompting from others. And having mentioned the grace of God, he doth not leave the whole to be God's; again, that by this also he may win them unto greater love, having said that he was stirred up from himself also. For, "being very earnest, he went forth of his own accord," 'he seized at the thing, he rushed upon the treasure, he considered your service to be his own advantage; and because he loved you exceedingly, he needed not the exhortation I gave; but though he was exhorted by me also, yet it was not by that he was stirred up; but from himself and by the grace of God.'”
Source

Scholastic

c. 1100 – 1500
1272
A.D.
Thomas Aquinas Catholic
1225–1274
“After he has treated of the giving of the collections, here he consequently treats of the ministers through whom the collections are made. And concerning this he does two things. First he names them; second he commends them to the Corinthians, at "the showing therefore which is," etc. Concerning the first he does three things. For first he names Titus; second Barnabas, at "we have also sent with him the brother," etc.; third Apollo, at "we have sent with them," etc. Concerning Titus he commends two things, namely his solicitude and the sign of his solicitude, at "for indeed the exhortation," etc. He says therefore first: I have said, above, that I asked Titus to complete this grace concerning the gathering of alms, which is incumbent upon my solicitude by the ordination of the apostles, in which matter I also found him solicitous; and therefore I give thanks to God, who gave the same solicitude, which I have, for you, to be exhorted and advanced to works of mercy, in the heart of Titus; because he too is solicitous, just as I am, that he may complete this grace in you. Heb. 6:11: we desire each one of you to show the same solicitude, etc. Rom. 12:8: he who presides, in solicitude. Now the sign of this solicitude is that when I asked him, he himself consented to my exhortation. And therefore he says: for indeed he received the exhortation. And because he pursued what I asked, whence he says: but since he was more solicitous by his own will than by my exhortation, he set out to you; who nevertheless at first refused to come on account of your sins. Rom. 12:11: in solicitude, not slothful. Consequently, when he says "but we have sent," etc., he treats of the second minister. And concerning this he does two things. First he commends him; second he adds the reason why he sends such solemn messengers, at "avoiding," etc. This brother, according to some, is Luke, or according to others Barnabas, whom indeed he commends from three things: from fame, because his praise, namely Luke's, is in the Gospel written by him throughout all the Churches, because it has been approved by the apostles. Or whose praise, namely Barnabas's, is in the Gospel preached by him throughout all the Churches, because to the Jews and to the Gentiles. Whence it is said of Barnabas, Acts 11:24, that he was a good man, full of faith and the Holy Spirit. Likewise he commends him from his companionship, because he is not only famous, but has also been appointed by the Churches of Judea as a companion of my pilgrimage, that is, of my preaching, by which, as pilgrims, we go about the world. Above ch. 5:6: as long as we are in the body, we are pilgrims from God, etc. And this is true of Luke, because he was one of the seventy-two disciples, and a companion of Paul. Of Barnabas likewise, because through the Holy Spirit it is said, Acts 13:2: separate for me Barnabas and Paul unto the work, etc. And he was made a companion in this grace, namely of the collection of alms. Or in this grace, namely of preaching, of which it is said Eph. 3:8: but to me, the least of all the saints, etc. Likewise he commends him from office, because he is a minister of the grace which is ministered by us. 1 Cor. 4:1: so let a man esteem us. Above ch. 3:6: who also has made us fit, etc. Now this grace is ministered unto the glory of the Lord, that is, that our Lord may be glorified, namely from the alms given, from the conversion of very many peoples to our preaching, because, as it is said Prov. 14:28, in the multitude of the people, etc. Likewise it is ministered, that our will may be fulfilled, because we wish this to be done. And therefore he says: and our will, destined — that is, predestined by God, who predestined from eternity that we should have such a will. Consequently, when he says "avoiding," etc., he assigns the cause why he sends such solemn messengers. And first he assigns the reason for this; second he proves it, at "we provide therefore," etc. He says therefore: the reason why we send such solemn messengers is this: that you may know that a business of this kind is present to our heart. And therefore he says "avoiding this," namely lest anyone, etc., as if to say: that we might avoid the reproach which could be cast upon me by some, either of negligence, if I did not send diligent men, or of fraud, if I did not send trustworthy ones. And these were diligent and ready and trustworthy, because they were given by the Churches and chosen through the Holy Spirit. Above ch. 6:3: giving no offense to anyone, etc. Now he says "in this abundance," namely of alms or of the conversion of the Gentiles. 1 Pet. 4:10: each one, as he has received grace, unto one another, etc. And he proves this, saying "for we provide," etc., as if to say: I rightly say "avoiding," because we provide — that is, we ought to provide — good things, that is, that our works may be good not only before God, that we may please him, but also before men, that is, that they may appear good to them. And this he does, by carefully procuring and imitating the good. Rom. 12:9: cleaving to the good, etc. Consequently, when he says "but we have sent with them our brother also," etc., he treats of the third messenger, namely of Apollo. Where he does two things. First, he commends him for his solicitude, when he says "whom," namely Apollo, "we have often proved to be solicitous for your salvation; but now much more solicitous." For, as appears above, Apollo was the first who preached at Corinth after the apostle. 1 Cor. 3:6: I planted, Apollo watered. But this man, disturbed by their sin, withdrew, and set aside the solicitude which he had before had for them. But now, having heard of their conversion, he became more solicitous for their salvation than he had been before. Eph. 4:3: solicitous to keep the unity of the spirit, etc. Rom. 12:8: he who presides, in solicitude, etc. Second, he adds the cause of the solicitude which he took up, because Apollo trusted concerning you from those things which Titus said about you, commending you. Whence he says "with much confidence in you," whether on account of Titus who is my companion, and because he willingly came into the fellowship of Titus and Luke or Barnabas, and because he was induced to this by the apostles of the Churches which are in Judea. And therefore he says "or our brethren," the apostles of the Churches of Judea, namely they induced him to have solicitude for you. Which Churches indeed are "of the glory of Christ," that is, unto the glory of Christ. Consequently, when he says "the showing therefore which is," etc., he commends these messengers to the Corinthians, saying: because we have sent such men to you, therefore "the showing," etc., that is, show by deed, that you have charity toward them, and that I have truly commended you, and that I have truly gloried concerning you in the face of the Churches, to which I have come and to which I have preached. Or "in the face of all the Churches," because what you do to them will become known to all the Churches.”

Reformation

c. 1500 – 1650
1637
A.D.
1567–1637
“For indeed he accepted the exhortation. The duty of exhorting you to almsgiving (Anselm). Of his oivn accord . Without being bidden by me, he took on himself this task of exhorting you to this pious work”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And we have sent with him the brother,.... The Syriac and Ethiopic versions read, "our brother"; and one of Stephens's copies, "your brother": who this brother was, is not certain; some think it was Luke the evangelist, the companion of the apostle in his travels: whose praise is in the Gospel, throughout all the churches; being known and highly commended by all the churches, for the Gospel he wrote; but it is not certain that Luke as yet had wrote his Gospel; and much less that it was so much known at present among the churches; and besides, this brother's praise seems to be on account of his preaching the Gospel, and not writing one: others think Barnabas is intended, who was chosen and sent out by the churches along with the apostle; but these in a short time separated from each other, nor do we read of their coming together again: others are of opinion, that Apollos is designed, who was a very eloquent preacher, and of whom the apostle had given the Corinthians an intimation in his former epistle, that he would come to them at a convenient time; but to him is objected, that he never was chosen of the churches, to travel with the apostle on such an account as here mentioned: others would have it that Silas or Silvanus is meant, who was a very constant companion of the apostle, and of whom he makes mention in most of his epistles; and others have made no doubt of it, but John Mark is here meant, who not only wrote a Gospel, but was an excellent preacher of it, and was chosen by the churches to go along with Paul and Barnabas; and though there was some distaste taken to him by Paul, he was afterwards reconciled to him, and for his profitableness in the ministry was greatly desired by him; but after all, it is difficult to determine who it was, nor is it of any great moment: a "brother" he was; being not only a regenerate person, but a preacher of the Gospel; a brother in the ministry, and "one whose praise was in the Gospel"; greatly admired, and much commended, for his excellent talent in preaching the Gospel; and for this he was famous "throughout all the churches"; a very great commendation indeed; but this is not all, it follows,”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“He accepted the exhortation - I advised him to visit you and excite you to this good work, and I found that he was already disposed in his heart to do it; God put this earnest care in the heart of Titus for you, Co2 8:16.”
1871
A.D.
1871
“being more forward--more earnest than to need such exhortation. he went--Greek, "went forth." We should say, he is going forth; but the ancients put the past tense in letter writing, as the things will have been past by the time that the correspondent, receives the letter. "Of his own accord," that is, it is true he has been exhorted by me to go, but he shows that he has anticipated my desires, and already, "of his own accord," has desired to go.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.