The interpretation timeline
2 Corinthians 8:21 Douay-Rheims

For we forecast what may be good not only before God, but also before men.

A.D. 155 – 1871 9 witnesses

Patristic

before A.D. 750
155
A.D.
Polycarp of Smyrna Patristic
c. A.D. 69–155
“And let the presbyters be compassionate and merciful to all, bringing back those that wander, visiting all the sick, and not neglecting the widow, the orphan, or the poor, but always "providing for that which is becoming in the sight of God and man;" abstaining from all wrath, respect of persons, and unjust judgment; keeping far off from all covetousness, not quickly crediting [an evil report] against any one, not severe in judgment, as knowing that we are all under a debt of sin. If then we entreat the Lord to forgive us, we ought also ourselves to forgive; for we are before the eyes of our Lord and God, and "we must all appear at the judgment-seat of Christ, and must every one give an account of himself." Let us then serve Him in fear, and with all reverence, even as He Himself has commanded us, and as the apostles who preached the Gospel unto us, and the prophets who proclaimed beforehand the coming of the Lord [have alike taught us]. Let us be zealous in the pursuit of that which is good, keeping ourselves from causes of offence, from false brethren, and from those who in hypocrisy bear the name of the Lord, and draw away vain men into error.”
Source
215
A.D.
c. A.D. 150–215
“But, above all, it seems right that we turn away from the sight of women. For it is sin not only to touch, but to look; and he who is rightly trained must especially avoid them. "Let thine eyes look straight, and thine eyelids wink right." For while it is possible for one who looks to remain stedfast; yet care must be taken against falling. For it is possible for one who looks to slip; but it is impossible for one, who looks not, to lust. For it is not enough for the chaste to be pure; but they must give all diligence, to be beyond the range of censure, shutting out all ground of suspicion, in order to the consummation of chastity; so that we may not only be faithful, but appear worthy of trust. For this is also consequently to be guarded against, as the apostle says, "that no man should blame us; providing things honourable, not only in the sight of the Lord, but also in the sight of men."”
Source
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“(That) we all know; provided, however, we remember what the same (God) has said through the apostle: "Let your probity appear before men." For what purpose, except that malice may have no access at all to you, or that you may be an example and testimony to the evil? Else, what is (that): "Let your works shine? " Why, moreover, does the Lord call us the light of the world; why has He compared us to a city built upon a mountain; if we do not shine in (the midst of) darkness, and stand eminent amid them who are sunk down? If you hide your lamp beneath a bushel, you must necessarily be left quite in darkness, and be run against by many.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“For "we take thought for things, honorable not only in the sight of the Lord, but also in the sight of men." What can compare with Paul? For he said not, 'Perdition and woe to him who chooses to suspect anything of the kind: so long as my conscience does not condemn me, I waste not a thought on those who suspect.' Rather, the weaker they were, the more he condescended. For it is meet not to be angry with, but help, him that is sick. And yet from what sin are we so removed as he was from any such suspicion? For not even a demon could have suspected that blessed saint of this unfaithfulness. But still although so far removed from that evil suspicion, he does everything and resorts to every expedient; so as not to leave a shadow even to those who might be desirous in any way of suspecting something wrong; and he avoids not only accusations, but also blame and the slightest censure, even bare suspicion.”
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
“Providing for honest things . I endeavour to act honourably, not only before God but also before men, lest suspicious persons should have some occasion for suspecting me of some wrongdoing. Wherefore, to show that I administer this collection honestly, I make Titus and Luke my witnesses, I make them the treasurers of it, and refrain from handling it myself. Hence learn this practical rule: We owe a good conscience to God, a good report to our neighbour: he who neglects good report acts cruelly towards his neighbour’s salvation (Anselm)”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And we have sent with him our brother,.... This is a third person sent about this business. The apostle, in this, conformed to the customs of his nation; at least if he did not purposely do it, it agrees with the Jewish canons, which require three persons for the distribution of alms. "The alms dish, (they say (x)) is by three; nor do they appoint "overseers" of it "less than three".'' Again, they say (y), "the poor's chest is collected by two, "but distributed by three"; it is collected by two, because they do not appoint governors over a congregation less than two, and it is distributed by three, even as pecuniary judgments; but the alms dish is collected by three, and distributed by three; for the collection and distribution are alike:'' who this brother was, sent by the apostle with Titus and the other person, is as uncertain as the former. Some think it was Luke, others Apollos, others Timothy, others Sosthenes, others Epaenetus, others Silas, others Zenas the lawyer; a brother he was, and a very considerable character is given of him: whom we have oftentimes proved diligent in many things; he was a very diligent and industrious man, and so fit for this service; he had been tried and proved, and was found to be so, not only once or twice, but oftentimes; and that not in a few instances, but in many; and in nothing did he ever show more diligence than in this matter: but now much more diligent; than ever he had been in anything before: upon the great confidence which I have in you; what doubled and increased this brother's diligence, and made him so eager for, and forward to this work, was, his observing the great confidence the apostle expressed of the very great readiness and liberality of the Corinthians; and which tacitly carries in it an argument exciting them thereunto: or this last clause may be read, "which he hath in you"; and so regards the confidence this brother had in them, which made him so ready to engage with, and join the other messengers. (x) T. Hieros. Peah, fol. 21. 1. (y) Misn. Peah, c. 8. sect. 7. & Jarchi, Maimonides & Bartenora, in ib. T. Bab. Bava Bathra, fol. 8. 2. Maimon. Mattanot Anayim, c. 9. sect. 5.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Providing for honest things - Taking care to act so as not only to be clear in the sight of God, but also to be clear in the sight of all men; avoiding even the appearance of evil. I wish the reader to refer to the excellent note on Co1 16:4 (note), which I have extracted from Dr. Paley.”
1871
A.D.
1871
“The Septuagint (Pro 3:4; Rom 12:17). The oldest manuscripts read, "For we provide." honest things--"things honorable."”
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.