The interpretation timeline
Galatians 2:2 Douay-Rheims

And I went up according to revelation; and communicated to them the gospel, which I preach among the Gentiles, but apart to them who seemed to be some thing: lest perhaps I should run, or had run in vain.

A.D. 155 – 1871 13 witnesses 14 excerpts

Patristic

before A.D. 750
155
A.D.
Polycarp of Smyrna Patristic
c. A.D. 69–155
“I exhort you all, therefore, to yield obedience to the word of righteousness, and to exercise all patience, such as ye have seen [set] before your eyes, not only in the case of the blessed Ignatius, and Zosimus, and Rufus, but also in others among yourselves, and in Paul himself, and the rest of the apostles. [This do] in the assurance that all these have not run in vain, but in faith and righteousness, and that they are [now] in their due place in the presence of the Lord, with whom also they suffered. For they loved not this present world, but Him who died for us, and for our sakes was raised again by God from the dead.”
Source
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“There would be still wanted that Gospel which St. Paul found in existence, to which he yielded his belief, and with which he so earnestly wished his own to agree, that he actually on that account went up to Jerusalem to know and consult the apostles, "lest he should run, or had been running in vain; " in other words, that the faith which he had learned, and the gospel which he was preaching, might be in accordance with theirs.”
Source
“For their rudimentary belief, which was still in suspense about the observance of the law, deserved this concessive treatment, when even the apostle himself had some suspicion that he might have run, and be still running, in vain. Accordingly, the false brethren who were the spies of their Christian liberty must be thwarted in their efforts to bring it under the yoke of their own Judaism before that Paul discovered whether his labour had been in vain, before that those who preceded him in the apostolate gave him their right hands of fellowship, before that he entered on the office of preaching to the Gentiles, according to their arrangement with him.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“His first journey was owing to his desire to visit Peter, his second, he says, arose from a revelation of the Spirit. "And I laid before them the Gospel which I preach among the Gentiles, but privately before them who were of repute, lest by any means I should be running or had run in vain." What is this, O Paul! thou who neither at the beginning nor after three years wouldest confer with the Apostles, dost thou now confer with them, after fourteen years are past, lest thou shouldest be running in vain? Better would it have been to have done so at first, than after so many years; and why didst thou run at all, if not satisfied that thou wert not running in vain? Who would be so senseless as to preach for so many years, without being sure that his preaching was true? And what enhances the difficulty is, that he says he went up by revelation; this difficulty, however, will afford a solution of the former one. Had he gone up of his own accord, it would have been most unreasonable, nor is it possible that this blessed soul should have fallen into such folly; for it is himself who says, "I therefore so run, as not uncertainly; so fight I, as not beating the air." (1 Cor. ix: 26.) If therefore he runs, "not uncertainly," how can he say, "lest I should be running, or had run, in vain?" It is evident from this, that if he had gone up without a revelation, he would have committed an act of folly. But the actual case involved no such absurdity; who shall dare to still harbor this suspicion, when it was the grace of the Spirit which drew him? On this account he added the words "by revelation," lest, before the question was solved, he should be condemned of folly; well knowing that it was no human occurrence, but a deep Divine Providence concerning the present and future. What then is the reason of this journey of his? As when he went up before from Antioch to Jerusalem, it was not for his own sake, (for he saw clearly that his duty was simply to obey the doctrines of Christ,) but from a desire to reconcile the contentious; so now his object was the complete satisfaction of his accusers, not any wish of his own to learn that he had not run in vain. They conceived that Peter and John, of whom they thought more highly than of Paul, differed from him in that he omitted circumcision in his preaching, while the former allowed it, and they believed that in this he acted unlawfully, and was running in vain. I went up, says he, and communicated unto them my Gospel, not that I might learn aught myself, (as appears more clearly further on,) but that I might convince these suspicious persons that I do not run in vain. The Spirit foreseeing this contention had provided that he should go up and make this communication. Wherefore he says that he went up by revelation, and, taking Barnabas and Titus as witnesses of his preaching, communicated to them the Gospel which he preached to the Gentiles, that is, with the omission of circumcision. "But privately before them who were of repute." What means "privately?" Rather, he who wishes to reform doctrines held in common, proposes them, not privately, but before all in common; but Paul did this privately, for his object was, not to learn or reform any thing, but to cut off the grounds of those who would fain deceive. All at Jerusalem were offended, if the law was transgressed, or the use of circumcision forbidden; as James says, "Thou seest, brother, how many thousands there are among the Jews of them which have believed; and they are informed of thee, that thou teachest to forsake the law." (Acts xxi: 20, et seq.) Since then they were offended he did not condescend to come forward publicly and declare what his preaching was, but he conferred privately with those who were of reputation before Barnabas and Titus, that they might credibly testify to his accusers, that the Apostles found no discrepancy in his preaching, but confirmed it. The expression, "those that were of repute," does not impugn the reality of their greatness; for he says of himself, "And I also seem to have the Spirit of God," thereby not denying the fact, but stating it modestly. And here the phrase implies his own assent to the common opinion.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“"So that I should not run or have run in vain" we should understand to be addressed as if in a question, not to those with whom he compared his gospel in private but to those to whom he was writing, so that it might appear that he was not running and had not run in vain from the fact that by the testimony of the others he was certified not to dissent from the truth of the gospel.”
Source
435
A.D.
John Cassian Patristic
c. A.D. 360–435
“Who could be so presumptuous and blind as to dare to trust his own judgment and discretion, when the vessel of election bears witness that he needs the partnership of his coapostles?”
749
A.D.
John of Damascus Patristic
A.D. 676–749
“At the beginning, when he received the Gospel, he did not go up, nor did he put this to the Apostles. For, having learned from Christ, he did not need their teaching. As the time went by, however, and while he was teaching the nations the Gospel without circumcision, some became scandalized, since those around Peter did not dismiss circumcision, whereas he was alone in dismissing it. Thus, because the Holy Spirit wished to cut out this scandal of the others, ordered him to come up with witnesses and to put it to the Apostles that he preaches without circumcision, so that they too may join him and this scandal for human beings might be dissolved.”
Source

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“After the Apostle, in the preceding chapter, commended the authority of the evangelical teaching in itself, now in this chapter he commends it on the part of the other apostles and of himself at the same time. And concerning this he does two things. First he commends the authority of his teaching from the approval of the other apostles; second, from the example of himself and the other apostles, at the place "We by nature Jews, not of the Gentiles," etc. Concerning the first he does two things. First he shows that the other apostles approved his teaching; second he shows that he freely reprehended the other apostles in those things which they said contrary to his teaching, at the place "When Peter had come," etc. Concerning the first he does two things. First he treats of the conference which he had with the apostles; second he intimates what followed from it, at the place "but neither was Titus," etc. Concerning the first he does two things. First he sets down the circumstances of the conference itself; second he sets down the conference itself, at the place "and I conferred with them," etc. As to the first he touches on four circumstances, namely the time, the place, the witnesses, and its motive. Now he describes the time when he says, "then after fourteen years." But against this: the Apostle was converted in the first year after the Passion of Christ, and after three years he went to Jerusalem, and thus there are four; and here he says "after fourteen years" he went again to Jerusalem, and thus there come to be eighteen; and then he found Peter in Jerusalem. And this cannot be, because Peter sat at Antioch for seven years, but at Rome for twenty-five years. And so there would be eighteen (two short of twenty) and seven — which are twenty-five years — before he went to Rome, and at Rome he stayed twenty-five years; therefore Peter would have lived after the Passion of Christ fifty years, which is false: because in the fortieth year from the Passion of Christ, Peter suffered at Rome, as is held in history, which was in the time of Nero. I respond. It must be said that when it is said "then," etc., it is not to be understood that after the three years fourteen more years elapsed before he went to Jerusalem, but that in the fourteenth year of his conversion he went up again. Nor are the seven years, during which Peter ruled the Antiochene Church, to be added on top of these fourteen, because he began to rule before these years. And since Antioch is near Jerusalem, it could be that at some point Peter had gone to Jerusalem, and then Paul found him there. And thus it is gathered from history that after fourteen years Peter came to Rome in the time of the emperor Claudius, and being there for twenty-five years, he completed the number of thirty-nine years, and died in the fortieth year after the Passion of the Lord. Now he says "fourteen" pointedly, to show that he had no need of the instruction of the apostles, if he was without them for fourteen years. But he describes the place when he says "Jerusalem." And he says "I went up," because it is situated on high. Now he went up to Jerusalem, in order to show himself in agreement with the prophecy which says, Isaiah 2:3: "Out of Sion shall go forth the law," etc. He describes the witnesses when he says, "with Barnabas, taking also Titus." Barnabas was a Jew, but Titus a Gentile. With them, therefore, he went up, so that he might have witnesses to his teaching, and so that he might show himself inclining to neither side, neither of the Jews nor of the Gentiles. Deuteronomy 17: "In the mouth of two or three every word stands." But he describes the motive when he says "according to a revelation of God," that is, God revealing it and commanding him that he should go up to Jerusalem. From this it can be gathered that all the acts and movements of the apostles were according to the instinct of the Holy Spirit. Job 37:11: "The clouds scatter their light," etc. Consequently, when he says "and I conferred," etc., he treats of the conference itself, where he does three things. First he sets forth the matter concerning which he conferred; second, the persons with whom he conferred; and third, the cause for which he conferred. The matter concerning which he conferred was the Gospel. And therefore he says, "I conferred with them the Gospel of God," etc. The persons with whom he conferred are the greater and more excellent among the apostles: "but apart with those," etc. But the useful and necessary cause: namely "lest perhaps in vain," etc. As to the first he says, "I went up to Jerusalem," where "I conferred with them," as with friends and equals, the Gospel which I preached among the Gentiles — not that I might learn it, since I was already taught by Christ; not that I might be certified of it, since I am so certain that even if an angel should say the contrary, I would not believe it, as is clear above in chapter 1. But I conferred for two reasons: namely, to intimate the unity of my teaching with the teaching of the other apostles. 1 Corinthians 1:10: "That you all say the same thing," etc. He therefore conferred with them, having as it were the same word as they, yet not holding them as equals. Likewise, to avoid the calumny of others. For the Apostle, because he had not lived with Christ, nor been taught by the apostles, but immediately after his conversion began to preach things that were hateful to the Jews — and especially concerning the calling of the Gentiles, and that the legal observances ought not to be kept — thus, then, he conferred the Gospel. But with whom he did this, he shows by adding, "but apart with those," etc., as if to say: not with all, but with those who were among the others of some authority and weight, namely with Peter, James and John, and the other great ones. Ecclesiasticus 9:21: "Deal with the wise and the prudent," etc. But "apart," etc. — not that he dealt or conferred with them concerning shameful or false things, as heretics do, but because he knew that there were Jews there who calumniated, on account of the fact that he had taught concerning the legal observances. And therefore, lest the truth lie open to calumny, he conferred apart with those who would not calumniate. Proverbs 25:9: "Treat thy cause with thy friend, and discover not the secret to a stranger," etc. Ecclesiasticus 8:21: "Before a stranger do not take counsel," etc. Thus, then, both the matter of the conference and the persons are clear. There follows the cause, which was, namely, "lest I should run, or had run, in vain" — that is, lest I be reckoned to have preached uselessly. Now he calls his preaching a "running," on account of the swiftness of his teaching, because in a short time he preached the Gospel from Jerusalem all the way to Illyricum, and even to Spain. Whence that saying could be said of him, Psalm 147:15: "His word runneth swiftly," etc.; 2 Thessalonians 3:1: "Brethren, pray for us, that the word of the Lord may run," etc. But did he doubt that he was running in vain? It must be said that he did not doubt for himself, but concerning those to whom he had preached — because unless his teaching were firmly held by them, as far as they were concerned he would have run in vain; and therefore he wished to confer with them, so that, when the hearers knew that his teaching agreed with the teaching of the other apostles, and was approved by them, they would hold his teaching more firmly, and thus, as far as they were concerned, he would not run in vain. 1 Corinthians 9:26: "I so run, not as at an uncertain thing." Consequently, when he says "but neither was Titus," etc., he shows what followed from the conference held with the apostles. And he sets down three things that followed from it: namely, that he did not depart from his own position; and that nothing was added over and above to his teaching, at the place "but from those who seemed," etc. Third, that his teaching was approved, at the place "but on the contrary, when they had seen," etc. Concerning the first he does two things. First he shows that he did not depart from his position in a certain particular matter; second he shows that he did not depart from it in any other matter either, at the place "but because of false brethren brought in unawares," etc. He says, then: I say that I conferred with them concerning the teaching of the Gospel in such a way that from this it followed that my teaching and position remained firm — namely, that the legal observances were not to be kept, so that the Gentiles were not compelled to keep the legal observances — to such an extent that not even Titus, who was with me, although he was also a Gentile, was compelled, by their arguments, to be circumcised, but was received by the apostles into fellowship uncircumcised. Whence then a decision was given by the apostles concerning the legal observances not being kept, as is found in Acts 15:28. Now the reason why, after the Passion of Christ, the legal observances ought not to be kept is assigned by Chrysostom as follows: for it is manifest that an instrument which is made concerning some promise or covenant holds only until the covenant and promise be fulfilled; once these are fulfilled, the aforesaid instrument no longer holds in this regard. Now circumcision is a certain instrument of the promise and covenant between God and faithful men; whence also Abraham received circumcision as a sign of the promise, as is said in Genesis 17. And because, the Passion of Christ having been accomplished, the promise was discharged and the covenant fulfilled, therefore after the Passion circumcision no longer holds, nor is it of any effect. Thus, then, it is clear that he did not depart from his position in that he did not permit Titus to be circumcised. Consequently he shows that he did not depart from it in any other matter either, when he says "but because of false brethren brought in unawares," etc. But this text is different in different copies and obscure, and is read thus: you say that you did not permit Titus to be circumcised, but why did you not permit it? Did you not elsewhere permit Timothy to be circumcised, as is read in Acts 16:3? To this the Apostle can respond thus: because at that time, when Timothy was circumcised, circumcision was a matter of indifference, namely whether it was kept or not; but now, when the matter concerned Titus, there was a special question about circumcision, which I was saying ought not to be kept. Whence if I had permitted him to be circumcised, since I myself had settled the question, it would have been done contrary to my own decision, nor was it lawful to raise the question further about this, or to make a difficulty of it, as being already determined. And therefore he says: I say that I not only did not permit him to be circumcised by them, to whom we yielded not even for an hour by way of subjection — namely, that the Gentiles should be made subject to the law. And this on account of those brought in unawares — by the Devil or by the Pharisees — false brethren, who feign themselves to be friends. 2 Corinthians 12: "peril from false brethren." Who — namely, the false brethren — came in unawares into the place where the apostles were, "to spy," that is, to spy out our liberty from sin and the law. 2 Corinthians 3:17: "Where the spirit of the Lord is, there is liberty." Romans 8:15: "For you have not received the spirit of bondage," etc. Below, chapter 4:5: "that he might redeem them who were under the law." Which — namely, liberty — we have in Christ Jesus, that is, through faith in Christ. Below, chapter 4, verse 31: "You are not the children of the bondwoman, but of the free." And for this they came in unawares: that they might bring us back into servitude — of the law and of carnal observances — as before the Passion of Christ, which is not to be done, because "no man can lay another foundation," etc., 1 Corinthians 3:11. And this "that the truth of the Gospel might remain with you" — as if to say: in nothing did we yield to them for this reason, namely lest we give occasion to those who said that without circumcision you could not be saved, which is contrary to the truth of the Gospel that I preached to you. But Ambrose reads it otherwise. For according to what has been said above, it is held that he did not yield for an hour on account of those brought in unawares. From which it follows that, had the false brethren not been brought in unawares, he would have yielded to them concerning the observance of the legal precepts. And therefore it was not on account of this, because he would not have yielded to them on account of this, but on account of the truth itself. Therefore Ambrose says that the text is corrupt, and that the word "neither" there is superfluous. Whence he wishes that "neither" not be there. And then the sense is: I did not permit Titus to be circumcised, but I permitted Timothy to be circumcised on account of the false brethren brought in unawares, in the place where I was with Timothy and the others, who came in unawares, etc. And since they had been unable to do this, they were striving to incite the people to sedition against us. To whom — namely, to the false brethren — for this reason we yielded for an hour to subjection, in the act of circumcision, by circumcising Timothy, there where it is said "that the truth of the Gospel might remain," etc., which holds that neither circumcision avails anything, nor uncircumcision, but faith. Now there was a special reason why Timothy was circumcised and not Titus: because Timothy was of a Gentile father and a Jewish mother, whereas Titus was of Gentile parents on both sides. And it was the Apostle's position that those who had been born of some Jewish parent should be circumcised, but those who had been born entirely of Gentile parents should by no means be circumcised.”

Reformation

c. 1500 – 1650
1637
A.D.
1567–1637
“I communicated unto them that Gospel which / preached ’ I put it before Peter and the Apostles, making them as it were judges of my Gospel, that they might approve, disapprove, add, or take away as they saw fit in common council, and that I might receive it then at their hands to be believed and taught See Gal. i 16, and comments. 238 THE EPISTLE TO THE Observe that the Apostle did not compare his Gospel with that of the other Apostles because he had any doubt of its truth or completeness, or of its agreement with that preached by Peter and the rest; for he knew most certainly, by the revelation of God, that together with them he had received the same full and perfect Gospel, as is evident from Gal L 11, 12. It was not for his own sake that he made the comparison, but for the sake of those converted to the faith, amongst whom Paul was traduced by the Judaising pseudo-Apostles, as one who, among the Gentiles, slighted the law of Moses, contrary to the practice of Peter, James, and John, nay, of Paul himself when among Jews. To show the falsity of the accusation, to show the agreement of his teaching with that of the other Apostles, and also to guard his own authority, Paul compares his Gospel with theirs, lest , he says, by any means I should run , or had run in vain. To them. That is to the first Christians, those made at Jerusalem, for the adjective “Christian” is latent in the substantive “Jerusalem.” Which were of reputation . Who seemed to be pillars (ver. 9.) of the Church and leading Apostles. Lest I should run in vain. Lest, through the report spread abroad by the pseudo-Apostles, that my teaching was condemned by the Apostles, the faithful should believe neither me nor my teaching, and so all my labour should be rendered ineffectual CfL S. Jerome (Ep. xi. ad August.), Tertullian (contra Mar cion. lib. iv.), and S. Augustine (contra Faustum), who anticipates Luther’s opinions, and against them shows that the word of God, even when most pure, and all its preachers, stand in need of the testimony and authority of men. This is what he says : “ Who is so foolish as to believe nowadays that the epistle produced by Manichceus was really written by Christ, and not to believe that what Matthew wrote contained the doings and sayings of Christl Even if he has doubts about Matthew being the author, at all events he prefers to believe about Matthew himself what he finds the Church believes, and what has been continuously believed and handed down from his times to the present, rather than what some fugitive or other from Persia, coming 200 or more years after THE FORCE OF TRADITION 239 Christ tells us about Christ's words and works . For would the Church wholly believe the Apostle Paul himself, who was called from heaven after the Lord's ascension , if he had not found Apostles in the flesh, to whom he might make it clear by communicating his Gospel that he was of the same fellowship as they ? ” (lib .xxviii. c. 4). Our Protestant friends should note this, and apply it to themselves, who prefer to believe Calvin, coming 1500 years after Christ, and teaching new doctrines, rather than the Church and the unanimous tradition of so many centuries. Observe that this testimony is not for the laity to give, even if they be magistrates, but for Peter and the Apostles, i.e., for the Roman Pontiff and the Bishops, who have succeeded the Apostles, whether individually, or assembled in council For Paul sought this testimony to his teaching and Apostleship from the Council of Jerusalem, in which the judges were the Apostles, and where Peter, as the president, spoke first and pronounced sentence. So from the time of the Apostles up to the present time, the whole Christian world, when doubts as to the faith, or new opinions, or heresies spring up, has sought from the Roman Pontiff, and from the Councils over which he presides, either in person or by his legates, a decision and testimony as to the truth. Whatever dogmas or doctors are condemned by them the whole Christian world regards as heretical. Heretics alone, because they are heretics, have refused to recognise this condemnation, this judgment, this testimony, and have in every age avoided it So it is not surprising if our Protestants do the same ; nay, their doing so is a sure proof of novelty, of wrong faith, and of heresy”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And I went up by revelation,.... He was not sent for by the apostles at Jerusalem, nor did he go of himself, nor only by the vote of the church at Antioch, but by a divine revelation; not a revelation made to the church, or by the prophets there, but by God himself to him; he had a secret impulse from the Spirit of God, and a private intimation given him, that it was the will of God he should go up at this time; which is no ways inconsistent with his being sent by the church, but served as a confirmation to him, that what they determined was right, and according to the mind of God: and communicated unto them that Gospel, which I preach among the Gentiles; that self-same Gospel, which he had preached, and still continued to preach to the Gentiles; relating to free and full remission of sin by the blood of Christ, justification by his righteousness without the works of the law, and freedom from all the rituals and bondage of the Mosaic dispensation: for as the Gospel he preached was all of a piece, uniform and consistent, so he did not preach one sort of doctrine to the Gentiles, and another to the Jews; but the very self-same truths which were the subject of his ministry in the Gentile world, which were a crucified Christ, and salvation alone by him, these he communicated, laid before, and exposed unto the consideration of the elders and apostles at Jerusalem; not with a view either to give or receive instructions, but to compare their sentiments and principles together; that so it might appear that there, was an entire harmony and agreement between them; and this he did not publicly, to the whole church, at least at first, and especially the article of Christian liberty, which respects the freedom of the believing Jews, from the yoke of the law; for as yet they were not able to bear this doctrine; they could pretty readily agree that the Gentiles were not obliged to it, but could not think themselves free from it; wherefore the apostle, in great prudence, did not avouch this in the public audience: but privately to them which were of reputation; or "who seemed to be", i.e. somewhat, very considerable persons; not in their own opinion, or appearance only, but in reality, they seemed to be, and were pillars in the house of God; particularly he means James, Cephas, and John, then in great esteem with the saints, and deservedly honoured and respected by them, they being faithful labourers in the word and doctrine; so the Jewish doctors (a) call men of great esteem, who "seem to be", or "are accounted of", a word to which the phrase here used answers: these were spiritual men, capable of judging of all spiritual things; men of full age, whose senses were exercised to discern between truth and error; and were very proper persons for the apostle to lay the scheme of his ministry before, and the various truths he insisted on in it: these he met "privately", or "separately", and "singly", as it may be rendered; he either conversed with the apostles alone, and all together, in some private house; or separately, one by one, in their own houses, and there freely and familiarly discoursed with them about the several doctrines of the Gospel; and particularly this, of freedom from the law: his end in it was, as he says, lest by any means I should run, or had run in vain: which is said, not with regard to himself, as if he had entertained any doubt of the doctrines he had preached, and needed any confirmation in them from them; for he was fully assured of the truth of them, and assured others of the same; or that he questioned the agreement of the apostles with him; or that his faith at all depended on their authority; but with regard to others, and his usefulness among them. The false teachers had insinuated that his doctrine was different from that of the apostles in Jerusalem, and so endeavoured to pervert the Gospel he preached, and overthrow the faith of those that heard him; and could this have been made to appear, it would in all likelihood have rendered, in a great measure, his past labours in vain, and have prevented his future usefulness: some read these words as an interrogation, "do I in any manner run, or have I run in vain?" no; from the account he laid before the church, the elders, and apostles, both in private and in public, Act 15:4 it clearly appeared what success attended his ministry, how many seals he had of it, what numbers of souls were converted under it, and how many churches were planted by his means; for by "running" here is not meant the Christian course he ran, in common with other believers, which lies in the exercise of grace, and the discharge of duty; but the course of his ministry, which he performed with great activity, application, diligence, and constancy, until he had finished it. (a) Vid. Sol. Ben Melech in Psal. xl 17.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“I went up by revelation - This either means, that he went up at that time by an express revelation from God that it was his duty to do so, made either to the Church of Antioch to send these persons to Jerusalem, or to these persons to go according to the directions of that Church; or the apostle here wishes to say, that, having received the Gospel by revelation from God, to preach Christ among the Gentiles, he went up according to that revelation, and told what God had done by him among the Gentiles: or it may refer to the revelation made to certain prophets who came to Antioch, and particularly Agabus, who signified by the Spirit that there would be a dearth; in consequence of which the disciples purposed to send relief to their poor brethren at Jerusalem. See Act 11:27-30. But privately to them which were of reputation - Τοις δοκουσι· To the chief men; those who were highest in reputation among the apostles. Δοκουντες, according to Hesychius, is οἱ ενδοξοι, the honorable. With these the apostle intimates that he had some private conferences. Lest by any means - And he held these private conferences with those more eminent men, to give them information how, in consequence of his Divine call, he had preached the Gospel to the Gentiles, and the great good which God had wrought by his ministry; but they, not knowing the nature and end of his call, might be led to suppose he had acted wrong, and thus labored in vain; and that, if he still continued to act thus, he should labor in vain. It was necessary, therefore, that he should give the apostolic council the fullest information that he had acted according to the Divine mind in every respect, and had been blessed in his deed.”
Source
1849
A.D.
1774–1849
“According to revelation, or an inspiration from the Spirit of God, and conferred with them, as an equal, says St. Jerome. — But apart to them, who seemed to be something considerable. That is, with the other apostles, lest I should run in vain, not for fear of false doctrine, says St. Chrysostom, but that others might be convinced that I preached not any thing disapproved by the apostles, which would prejudice the progress of the gospel. (Witham) — The particle but, which begins this verse, is quite useless: the Latin Vulgate and the Greek copies have it indeed, but in many copies it is not found; it is omitted also by St. Jerome and Theodoret; and this verse is united in sense with the preceding. Titus was not compelled to be circumcised on account of the false brethren, &c.”
Source
1863
A.D.
1796–1863
“The apostle held this conference through no doubt of the correctness of the doctrines, which he had received from Divinfe revelation, but with a view to strengthen his influence with the faithful, by the approval of those who stood high in the Church. The image of one who runs out of the right course, and not towards the goal, is employed to represent a teacher who deviates from sound doctrine. " He did not need to learn that he had not run in vain, but he wished that his accusers should be convinced." St. Chrysostom.”
Source
1871
A.D.
1871
“by revelation--not from being absolutely dependent on the apostles at Jerusalem, but by independent divine "revelation." Quite consistent with his at the same time, being a deputy from the Church of Antioch, as Act 15:2 states. He by this revelation was led to suggest the sending of the deputation. Compare the case of Peter being led by vision, and at the same time by Cornelius' messengers, to go to CÃ&brvbrsarea, Acts 10:1-22. I . . . communicated unto them--namely, "to the apostles and elders" (Act 15:2): to the apostles in particular (Gal 2:9). privately--that he and the apostles at Jerusalem might decide previously on the principles to be adopted and set forward before the public council (Acts 15:1-29). It was necessary that the Jerusalem apostles should know beforehand that the Gospel Paul preached to the Gentiles was the same as theirs, and had received divine confirmation in the results it wrought on the Gentile converts. He and Barnabas related to the multitude, not the nature of the doctrine they preached (as Paul did privately to the apostles), but only the miracles vouchsafed in proof of God's sanctioning their preaching to the Gentiles (Act 15:12). to them . . . of reputation--James, Cephas, and John, and probably some of the "elders"; Gal 2:6, "those who seemed to be somewhat." lest, &c.--"lest I should be running, or have run, in vain"; that is, that they might see that I am not running, and have not run, in vain. Paul does not himself fear lest he be running, or had run, in vain; but lest he should, if he gave them no explanation, seem so to them. His race was the swift-running proclamation of the Gospel to the Gentiles (compare "run," Margin, for "Word . . . have free course," Th2 3:1). His running would have been in vain, had circumcision been necessary, since he did not require it of his converts.”
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.