The interpretation timeline
Romans 16:16 Douay-Rheims

Salute one another with an holy kiss. All the churches of Christ salute you.

A.D. 215 – 1871 8 witnesses 9 excerpts

Patristic

before A.D. 750
215
A.D.
c. A.D. 150–215
“If we are called to the kingdom of God, let us walk worthy of the kingdom, loving God and our neighbor. Love is not proved by a kiss but by kindly feeling. But there are those who do nothing but make the church resound with a kiss, not having love itself inside them. For this very thing, the shameless use of a kiss, which ought to be mystic, occasions foul suspicions and evil reports. The apostle, however, calls the kiss holy.”
Source
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“What prayer is complete if it is divorced from the holy kiss?”
“But when is peace more to be concluded with brethren than when, at the time of some religious observance, our prayer ascends with more acceptability; that they may themselves participate in our observance, and thereby be mollified for transacting with their brother touching. their own peace? What prayer is complete if divorced from the "holy kiss? " Whom does peace impede when rendering service to his Lord? What kind of sacrifice is that from which men depart without peace? Whatever our prayer be, it will not be better than the observance of the precept by which we are bidden to conceal our fasts; for now, by abstinence from the kiss, we are known to be fasting.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"Salute one another with an holy kiss." To cast out of them, by this salutation, all arguing that confused them, and all grounds for little pride; that neither the great might despise the little, nor the little grudge at the greater, but that haughtiness and envy might be more driven away, when this kiss soothed down and levelled every one. And therefore he not only bids them salute in this way, but sends in like manner to them the greeting from the Churches. For "there salute you," he says, not this or that person individually, but all of you in common, "The Churches of Christ." You see that they are no small gains that we earn from these addresses, and what treasures we should have passed hastily over, unless in this part of the Epistle also we had examined it with accuracy, such, I mean, as was in our power. So if there be found any man of wisdom and spiritual, he will dive even deeper, and find a greater number of pearls. But since some have often made it a question wherefore it was that in this Epistle he addressed so many, which thing he has not done in any other Epistle, we might say that it is owing to his never having seen the Romans yet, that he does this. And yet one may say, "Well, he had not seen the Colossians either, and yet he did not do anything of the kind." But these were more honorable than others, and had come thither from other cities, as to a safer and more royal city. Since then they were living in a foreign country, and they needed much provision for security, and some of them were of his acquaintance, but some too were there who had rendered him many important services, he with reason commends them by letters; for the glory of Paul was then not little, but so great, that even from his sending them letters, those who had the happiness to have an Epistle to them, gained much protection. For men not only reverenced him, but were even afraid of him. Had this not been so, he would not have said, who had been "a succorer of many, and of myself also." (v. 2.) And again, "I could wish that myself were accursed." (Rom. ix. 3.) And to Philemon he wrote and said, "as Paul the aged, and a prisoner of Jesus Christ." (Phil. 9.) And to the Galatians, "Behold, I Paul say unto you." (Gal. v. 2.) And, "Ye received me even as Jesus Christ." (ib. iv. 14.) And writing to the Corinthians he said, "Now some are puffed up, as though I would not come unto you." (1 Cor. iv. 18.) And again, "These things I have in a figure transferred to myself and to Apollos, that ye might learn in us not to think of men above that which is written." (ib. 6.) Now from all these passages it is clear that all had a great opinion of him. Wishing then that they should feel on easy terms, and be in honor, he addressed each of them, setting forth their praise to the best advantage he might. For one he calls beloved another kinsman, another both, another fellow-prisoner, another fellow-worker, another approved, another elect. And of the women one he addresses by her title, for he does not call her servant of the Church in an undefined way (because if this were so he would have given Tryphena and Persis this name too), but this one as having the office of deaconess, and another as helper and assistant, another as mother, another from the labors she underwent, and some he addresses from the house they belonged to, some by the name of Brethren, some by the appellation of Saints. And some he honors by the mere fact of addressing them, and some by addressing them by name, and some by calling them first-fruits, and some by their precedence in time, but more than all, Priscilla and Aquila. (touj peri Pr. k. 0A.) For even if all were believers, still all were not alike, but were different in their merits. Wherefore to lead them all to greater emulation, he keeps no man's encomiums concealed. For when they who labor more, do not receive the greater reward also, many become more listless. On this ground even in the kingdom, the honors, are not equal, nor among the disciples were all alike, but the three were preeminent above the rest. And among these three again there was a great difference. For this is a very exact method observed by God even to the last. Hence, "one star differeth from another star in glory," (1 Cor. xv. 41), it says. And yet all were Apostles and all are to sit on twelve thrones, and all left their goods, and all companied with Him; still it was the three He took. And again, to these very three, He said it was possible (egxwrein) that some might even be superior. "For to sit," He says, "on My right hand and on My left, is not mine to give, save to those for whom it is prepared." (Mark x. 40.) And He sets Peter before them, when He says, "Lovest thou Me more than these?" (John xxi. 15.) And John too was loved even above the rest. For there shall be a strict examination of all, and if thou be but little better than thy neighbor, if it be even an atom, or anything ever so little, God will not overlook even this. And this even from of old one might see coming out. For even Lot was a righteous man, yet not so, as was Abraham; and Hezekiah again, yet not so as was David: and all the prophets, yet not so as was John. Where then are they who with all this great exactness in view, yet will not allow that there is a hell? For if all the righteous are not to enjoy the same lot, if they exceed others even a little ("for one star," it says, "differeth from another star in glory,") (1 Cor. xv. 41), how are sinners to be in the same lot with the righteous? Such a confusion as this even man would not make, much less God! But if ye will, I will show you that even in the case of sinners, arguing from existing facts, there is this distinction, and exact just judgment. Now consider; Adam sinned, and Eve sinned, and both transgressed, yet they were not equally sinful. And therefore neither were they equally punished. For the difference was so great that Paul said, "Adam was not deceived but the woman being deceived was in the transgression." And yet the deceit was one. But still God's searching examination pointed out a difference so great, as that Paul should make this assertion. Again, Cain was punished, but Lamech, who committed a murder after him, did not suffer near so great a punishment. And yet this was a murder, and that was a murder, and that so much the worse, because even by the example he had not become the better. But since the one neither killed his brother after exhortation, nor needed an accuser, nor shrunk from answering when God questioned him, but even without any accuser both pleaded again himself, and condemned himself more severely, he obtained pardon. But the other as having done the opposite was punished. See with what exactness God sifteth the facts. For this reason He punished those in the flood in one way, and those in Sodom in another; and the Israelites again, both those in Babylon, and those in Antiochus' time, in different ways: so showing that He keeps a strict account of our doings. And these were slaves for seventy years, and those for four hundred, but others again ate their children, and underwent countless other more grievous calamities, and even in this way were not freed, either they or those that were burnt alive in Sodom. "For it shall be more tolerable," He says, "for the land of Sodore and Gomorrha, than for that city." (Matt. x. 15.) For if He hath no care for us, either when we sin or when we do aright, perhaps there will be some reason in saying that there is no punishment. But since He is so exceedingly urgent about our not sinning, and adopts so many means to keep us in the right, it is very plain that He punisheth the wicked, and also crowneth those that do right. But let me beg you to consider the unfairness of the generality. For they find fault with God because He so often long-suffering, overlooks so many that are impious, impure, or violent, without now suffering punishment. Again, if He threaten to punish them in the other world, they are vehement and pressing in their accusations. And yet if this be painful, they ought to accept and admire the other. But alas the folly! the unreasonable and asinine spirit! alas the sin-loving soul, that gazes after vice! For it is from this that all these opinions have their birth. And so if they who utter these things should be minded to lay hold upon virtue, they will presently find themselves satisfied concerning hell also, and will not doubt. And where (it is said) and in what place is this hell? For some fablers say that it is in the valley of Josaphat, thus drawing that which was said about a certain by-gone war, to apply to hell. But the Scripture does not say this. But in what place, pray, will it be? Somewhere as I think at least quite out of the pale of this world. For as the prisons and mines are at a great distance from royal residences, so will hell be somewhere out of this world. Seek we not then to know where it is, but how we may escape it. Neither yet because God doth not punish all here, therefore disbelieve things to come. For merciful and long-suffering He is: that is why he threatens, and does not cast us into it forthwith. For "I desire not," He says, "the death of a sinner." (Ez. xviii. 32.) But if there is no death of a sinner, the words are but idle. And I know indeed that there is nothing less pleasant to you than these words. But to me nothing is pleasanter. And would it were possible at our dinner, and our supper, and our baths, and everywhere, to be discoursing about hell. For we should not then feel the pain at the evils in this world, nor the pleasure of its good things. For what would you tell me was an evil? poverty? disease? captivity? maiming of the body? Why all these things are sport compared to the punishment there, even should you speak of those who are tormented with famine all their life long; or those who are maimed from their earliest days, and beg, even this is luxury compared to those other evils. Let us then continually employ ourselves with talking about these things. For to remember hell prevents our falling into hell. Dost thou not hear St. Paul saying, "Who shall suffer everlasting punishment from the face of the Lord?" (2 Thess. i. 9.) Dost thou not hear what Nero's character was, whom Paul even calls the Mystery of Antichrist? For "the mystery of iniquity," he says, "already worketh." (ib. ii. 7.) What then? Is Nero to suffer nothing? Is Antichrist to suffer nothing? or the Devil nothing? Then he will always be Antichrist, and so the Devil. For from mischief they will not leave off, unless they be punished. "Yea," you say, "but that there is a hell everybody sees. But the unbelievers only are to fall into it." What is the reason, pray? It is because the believers acknowledge their Master. And what is this to the purpose? when their life is impure, they will on this ground be punished more severely than the unbelievers. "For as many as have sinned without law shall also perish without law: but as many as have sinned in the law shall be judged by the law." (Rom. ii. 12.) And, "The servant that knew his master's will, and did it not, shall be beaten with many stripes." (Luke xii. 47.) But if there is no such thing as giving an account of one's life, and all this is said in a loose way then neither will the Devil have vengeance taken upon him. For he too knows God, and far more than men too, and all the demons know Him, and tremble, and own He is their Judge. If then there is no giving an account of our life, nor of evil deeds, then will they also clean escape. These things are not so, surely they are not! Deceive not yourselves, beloved. For if there is no hell, how are the Apostles to judge the twelve tribes of Israel? How cometh Paul to say, "Know ye not that we shall judge Angels? how much more things of this life?" (1 Cor. vi. 3.) How came Christ to say, "The men of Nineveh shall arise and condemn this generation" (Matt. xii. 41); and, "It shall be more tolerable for the land of Sodom in the day of judgment?" ib. xi. 24.) Why then make merry with things that are no subjects for merriment? Why deceive thyself and put cheats upon thy reason (paralogizh, om. thn yuxhnsou)? Why fight with the love of God toward man? For it was through this that He prepared it, and threatened, that we might not be cast into it, as having by this fear become better. And thus he that does away with speaking on these subjects doth nothing else than thrust us into it, and drive us thither by this deceit. Slacken not the hands of them then that labor for virtue, nor make the listlessness of them that sleep greater. For if the many be persuaded that there is no hell, when will they leave off vice? Or when will right be seen? I do not say between sinners and righteous men, but between sinners and sinners? For why is it that one is punished here, and another not punished, though he does the same sins, or even far worse? For if there be no hell, you will having nothing to say in defence of this to those who make it an objection. Wherefore my advice is, that we leave off this trifling, and stop the mouths of those that are gainsayers upon these subjects. For there will be an exact searching into the smallest things, both in the way of sins and in the way of good deeds, and we shall be punished for unchaste looks, and for idle words, and for mere reproachful words, and for drunkenness we shall render an account, as even for a cup of cold water we shall receive a reward, and a sigh only. (Eccl. xii. 14.) For it says, "Set a mark upon the foreheads of the men that sigh and that cry." (Ez. ix. 4.) How then darest thou to say that He, who with so great exactness will search into our doings, threatened hell in bare words, and lightly? Do not, I beseech you, do not with these vain hopes destroy thyself and those that are persuaded by thee! For if thou disbelievest our words, make enquiry of Jews and Gentiles, and all heretics. And all of them as with one mouth will answer that a judgment there shall be, and a retribution. And are men not enough? Ask the devils themselves, and thou wilt hear them cry, "Why hast thou come thither to torment us before the time." (Matt. viii. 29.) And putting all this together persuade thy soul not to trifle idly, least by experience thou come to know there is a hell, but from this thou mayest be sobered, and so able to escape those tortures, and attain to the good things to come; whereof may we all partake by the grace and love towards man, etc.”

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“After the Apostle set forth to the faithful Romans, to whom he was writing, certain personal matters pertaining to himself, here he sets down certain personal matters pertaining to others. And concerning this he does three things. First, he admonishes them what they ought to do toward others; second, he shows what others do toward them, at the words he salutes you, etc.; third, he ends the epistle with a giving of thanks, at the words now to him who is able, etc. Concerning the first he does two things. First he shows whom they ought to greet; second he shows whom they ought to avoid, at the words now I beseech you, brethren. Concerning the first, he commands that certain persons be greeted specifically; second, he sets down in general the manner of greeting, at the words greet one another, etc. Third, he greets them in common on behalf of the faithful, at the words they salute you, etc. Concerning the first, he speaks of a certain Corinthian woman who was going to Rome, whom he commends to them, describing her, first, by name, saying, now I commend to you Phoebe, who, although she was devoted to God, nevertheless was not of such authority that she did not need letters of commendation, just as he himself says of himself in 2 Corinthians 3:1: or do we need, as some do, letters of commendation? Second, he describes her by the religion of faith, saying our sister. For all faithful women are called sisters, just as all men are called brothers. Matthew 23:8: you are all brethren. Third, by the office of piety, when he says who is in the ministry of the Church which is at Cenchreae, the port of the Corinthians, where some Christians were gathered, whom the aforesaid woman served — just as also of Christ himself it is said in Luke 8:3 that certain women ministered to him from their means. And concerning the widow to be chosen it is said in 1 Timothy 5:10: if she has received guests, if she has washed the feet of the saints. Then he states two things in which he wishes her to be held as commended, of which the first is that she be honorably received. And this is what he says: that you receive her in the Lord, that is, for the love of God. Worthily of the saints, that is, according to what is worthy for saints to be received, according to Matthew 10:11: he who receives a just man in the name of a just man shall receive the reward of a just man. Certain books have, worthily enough, that is, fittingly; however this reading does not agree with the Greek. The second is that they help her diligently. Hence he adds that you assist her, namely by bringing counsel and aid in whatever business she may need of you. For perhaps she had some business to transact in Caesar's court. But against this seems to be what is said in 1 Thessalonians 4:11: attend to your own business — as if to say: do not meddle in the affairs of others. But it must be said that assisting in the affairs of others happens in two ways. In one way, in a worldly manner, that is, for the favor of men or for gain, and this does not befit the servants of God. 2 Timothy 2:4: no man serving as a soldier for God entangles himself in secular business. In another way, someone assists in the affairs of others out of piety, as in aid of the needy and the wretched, and this is a religious act, according to James 1:27: pure and undefiled religion before God and the Father is this: to visit orphans and widows in their tribulation. And it is in this way that the Apostle speaks here. Finally, the Apostle shows her merit, why this is owed to her, saying for she also has assisted many, and myself as well. Isaiah 3:10: say to the just man that it is well, for the reward of his hands shall be given to him. Matthew 5:7: blessed are the merciful, for they shall obtain mercy. Then he commands that certain other persons joined to himself be greeted, saying, greet Prisca and Aquila — who was the husband of Prisca, but he places the woman first, perhaps on account of a greater devotion of faith — my helpers in Christ Jesus, that is, in the preaching of the faith of Christ. For he lodged with them at Corinth, as is found in Acts 18:2 and following. Who for my life laid down their own necks, that is, exposed themselves to the danger of death for the preserving of my life, which is a sign of the greatest charity. John 15:13: greater love than this has no one, that a man lay down his life for his friends. Now this seems to have happened at Corinth, where Paul suffered persecution, as is found in Acts 18:6. Or perhaps it must better be said that they exposed themselves to danger for the Apostle. For that which is read in Acts 18:2 took place when Prisca and Aquila, departing from Rome, came to Corinth, as is said in the same place. But the Apostle was writing this when he still supposed them to be at Rome. Now the life of the Apostle was necessary not so much for himself as for others, according to Philippians 1:24: but to remain in the flesh is necessary for your sake. And therefore he adds, to whom not only I give thanks, but also all the churches of the Gentiles — of whom I am the apostle and teacher, 1 Timothy 2:7: teacher of the Gentiles in faith and truth. And also, greet their household church. For they had many of the faithful gathered together in their house. Then he wishes another to be greeted, joined to him in love, saying, greet Epaenetus, beloved to me, who is the first-fruits of Asia in Christ. For he was the first in all of Asia to be converted to the faith of Christ, which was for him a matter of great dignity, Hebrews 12:22-23: you have come to the church of the firstborn, who are enrolled in heaven. But he was then at Rome. Then he says, greet Mary, who has labored much among you, to this end, that she might call them back to concord; and when she was not able to do this, she made it known to the Apostle. Wisdom 3:15: glorious is the fruit of good labors. Then he says, greet Andronicus and Junia, whom, first, he describes by lineage, when he says my kinsmen. In which he shows that they were Jews, concerning whom above, chapter 9:3: who are my kinsmen according to the flesh. Second, by the suffering undergone for Christ, saying and my fellow captives. For they had at some time been imprisoned along with the Apostle of Christ. 2 Corinthians 11:23: in prisons more abundantly. Third, by authority, when he says who are of note among the apostles, that is, noble among the preachers, according to Proverbs, the last chapter: her husband is noble in the gates. Fourth, by time, when he says and were in Christ Jesus before me. For they had been converted before the Apostle himself, and on this account greater reverence was owed to them. 1 Timothy 5:1: rebuke not an elder, but entreat him as a father. Then he says, greet Ampliatus, my beloved in the Lord, namely with the love of charity, which is in Christ. Philippians 1:8: God is my witness, how I long for you all in the bowels of Christ. Then he says, greet Urbanus, our helper in Christ, namely in the preaching of the faith, Proverbs 18:19: a brother who is helped by a brother, etc. And Stachys, my beloved, whom he joins together, because perhaps they dwelt together, or were joined by some other bond of relationship. Then he says, greet Apelles, approved in Christ, that is, tested in Christ, perhaps through some tribulations. Job 23:10: he has tried me as gold that passes through fire. Then he says, greet all who are of the household, that is, of the family of Aristobulus, in whose house many of the faithful were gathered together; he does not greet Aristobulus himself, because perhaps for some reason he was absent. Then he says, greet Herodion, my kinsman, who from this very fact is said to have been a Jew. Then he says, greet all who are of the household of Narcissus, who is said to have been a priest and to have traveled through desert places in order to strengthen the faithful of Christ. Hence, because the Apostle knew that he was at that time absent, he does not command that he himself be greeted, but his household. There were, however, in his household some unbelievers, and therefore, for the sake of distinction, he adds who are in the Lord, because he commands only the faithful to be greeted. 2 John 10: if anyone comes to you and does not bring this doctrine, do not receive him into your house, nor say to him, greetings. Then he says, greet Tryphaena and Tryphosa, who have labored in the Lord, that is, in the ministry of the saints, which the Lord reckons as done to himself, according to Matthew 25:40: what you have done to one of the least of mine, you have done to me. Then he says, greet Persis, my dearest, whom the Apostle especially loved on account of her devotion. Hence he adds who has labored much in the Lord, namely by exhorting others and ministering to the saints, and also in poverty and other spiritual labors. 2 Corinthians 11:27: in labors, in fastings, in watchings, etc. Then he says, greet Rufus, chosen in the Lord, that is, in the grace of Christ, Ephesians 1:4: he chose us in him before the foundation of the world — and his mother, namely according to the flesh, and mine, because she was his mother by kindness. For she had at some time served the Apostle, although she was not then at Rome. 1 Timothy 5:2: older women as mothers, younger women as sisters, in all chastity. Then he says, greet Asyncritus, Hermes, Patrobas, Hermas, and the brethren who are with them, whom he greets together, because they lived together in harmony. Psalm 67:6: who makes those of one manner to dwell in a house. Then he says, greet Philologus and Julia, Nereus and his sister Olympias, and all the saints who are with them, that is, sanctified in the faith of Christ. 1 Corinthians 6:11: you have been washed and you have been sanctified. Then he shows the manner in which they should generally greet one another, saying, greet one another with a holy kiss, which is said in distinction from the lustful kiss, of which it is said in Proverbs 7:13: having caught hold of him, she kisses the young man. And also in distinction from the deceitful kiss, of which it is said in Proverbs 27:6: better are the wounds of one who loves, than the deceitful kisses of an enemy. Now a holy kiss is one that is given as a sign of the Holy Trinity. Song of Songs 1:1: let him kiss me with the kiss of his mouth. From this, moreover, a custom grew up in the Church that the faithful should give one another kisses of peace during the solemnities of the Mass. Then he greets them on behalf of the other churches, saying, all the churches of Christ salute you, that is, those gathered in the name and faith of Christ, because they all desire your welfare and pray for you. James, the last chapter: pray for one another, that you may be saved.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Now I beseech you, brethren,.... The apostle being about to finish his epistle, and recollecting that he had not given this church any instructions about the false teachers, who had been the cause of all their differences and uneasiness, inserts them here; or he purposely put them in this place, amidst his salutations, that they might be taken the more notice of; and very pertinently, since nothing could more express his great affection and tender concern for them; and these instructions he delivers to them, not in an authoritative way, as he might, and sometimes did, but by way of entreaty, beseeching them, and with the kind and loving appellation of brethren, the more to engage them to attend to what he was about to say to them: them which cause divisions and offences, contrary to the doctrine which ye have learned. The men he would have taken notice of were such who divided them in their religious sentiments, introducing heterodox notions, contrary to the doctrine of the Scriptures, of Christ and his apostles, and which they had learned from them; such as justification by the works of the law, the observance of Jewish days, and abstinence from meats, enjoined by the ceremonial law, and that as necessary to salvation; to which some gave heed, and others not, and so were divided; whereas the doctrine of faith is but one, the Gospel is one uniform thing, all of a piece; and those that profess it ought to be perfectly joined together in the same mind, and in the same judgment: hence their minds were alienated from each other, and they began to despise and judge one another, yea, to go into factions and parties, being unwilling to receive and admit each other to communion; and thus by these men they were divided in sentiments, affection, and worship; and which must needs cause offence to the church and the godly members of it, as well as cause many so to be offended, as to stumble and fall from the doctrine of faith, and profession of it, and greatly stagger and distress weak believers, and bring a scandal on religion, and the name and ways of Christ among the world, as nothing does more so than the jars and discords among Christians: wherefore the apostle advises to "mark" such persons, look out for, narrowly watch, strictly observe, and diligently examine them: the metaphor is taken from watchmen, who look out from their watch tower, and observe who are coming, or pass by, and take up suspicious persons, and carefully inquire who they are, and what they are about, and whether friends or foes. So both ministers of the Gospel, and members of churches, should not be asleep, which is the opportunity false teachers take to sow the seeds of false doctrine, discord, and contention, but should watch, and be upon their guard, and look diligently, that none among them fail of, or fall from, the doctrine of grace, or any root of bitterness, error, or heresy as well as immorality, spring up, which may be troublesome, and defile others; they should observe, and take notice of such who are busy to spread false doctrine, should watch their motions, follow them closely, take them to an account, examine their principles according to the word of God; and if found to be contrary thereunto, note them as false teachers: and avoid them; shun their ministry, drop attendance on it, depart far from them, have no private conversation with them, receive them not into their houses, nor bid them God speed; with such do not eat, have no communion with them at the Lord's table, withdraw from them as disorderly persons, who act contrary to the doctrine and order of the Gospel, and after proper admonition reject them from all fellowship with you.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Salute one another with a holy kiss - In those early times the kiss, as a token of peace, friendship, and brotherly love, was frequent among all people; and the Christians used it in their public assemblies, as well as in their occasional meetings. This was at last laid aside, not because it was abused, but because, the Church becoming very numerous, the thing was impossible. In some countries the kiss of friendship is still common; and in such countries it is scarcely ever abused, nor is it an incentive to evil, because it is customary and common. Shaking of hands is now substituted for it in almost all Christian congregations. The Churches of Christ salute you - The word πασαι, All, is added here by some of the most reputable MSS. and principal versions; and Griesbach has received it into his text. St. Paul must mean, here, that all the Churches in Greece and Asia, through which he had passed, in which the faith of the Christians at Rome was known, spoke of them affectionately and honourably; and probably knowing the apostle's design of visiting Rome, desired to be kindly remembered to the Church in that city.”
Source
1849
A.D.
1774–1849
“Thus the primitive Christians express their concord and benevolence, as also their perfect equality. For it was customary with the Persians, and all oriental nations, to salute only their equals thus; though, to their inferiors, the presented their hand to be kissed. (St. Clem. Pædog. and Polus.)”
1871
A.D.
1871
“Salute one another with an holy kiss--So Co1 16:20; Th1 5:26; Pe1 5:14. The custom prevailed among the Jews, and doubtless came from the East, where it still obtains. Its adoption into the Christian churches, as the symbol of a higher fellowship than it had ever expressed before, was probably as immediate as it was natural. In this case the apostle's desire seems to be that on receipt of his epistle, with its salutations, they should in this manner expressly testify their Christian affection. It afterwards came to have a fixed place in the church service, immediately after the celebration of the Supper, and continued long in use. In such matters, however, the state of society and the peculiarities of different places require to be studied. The churches of Christ salute you--The true reading is, "All the churches"; the word "all" gradually falling out, as seeming probably to express more than the apostle would venture to affirm. But no more seems meant than to assure the Romans in what affectionate esteem they were held by the churches generally; all that knew he was writing to Rome having expressly asked their own salutations to be sent to them. (See Rom 16:19).”
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.