And all the brethren who are with me. -- He appears to have usually written in the name of many persons, judging that, if those to whom he wrote should attach less weight to a solitary individual, they might listen to a greater number, and would not despise a whole congregation. His general practice is, to insert the salutations from brethren at the conclusion, instead of introducing them at the commencement as joint authors of the epistle: at least, he never mentions more than two names, and those very well known. But here he includes all the brethren; and thus adopts, though not without good reason, an opposite method. The concurrence of so many godly persons must have had some degree of influence in softening the minds of the Galatians, and preparing them to receive instruction. To the churches of Galatia. It was an extensive country, and therefore contained many churches scattered through it. But is it not wonderful that the term "Church", which always implies unity of faith, should have been applied to the Galatians, who had almost entirely revolted from Christ? I reply, so long as they professed Christianity, worshipped one God, observed the sacraments, and enjoyed some kind of Gospel ministry, they retained the external marks of a church. We do not always find in churches such a measure of purity as might be desired. The purest have their blemishes; and some are marked, not by a few spots, but by general deformity. Though the doctrines and practices of any society may not, in all respects, meet our wishes, we must not instantly pronounce its defects to be a sufficient reason for withholding from it the appellation of a Church. Paul manifests here a gentleness of disposition utterly at variance with such a course. Yet our acknowledgment of societies to be churches of Christ must be accompanied by an explicit condemnation of everything in them that is improper or defective; for we must not imagine, that, wherever there is some kind of church, everything in it that ought to be desired in a church is perfect. I make this observation, because the Papists, seizing on the single word Church, think that whatever they choose to force upon us is sanctioned; though the condition and aspect of the Church of Rome are widely different from what existed in Galatia. If Paul were alive at the present day, he would perceive the miserable and dreadfully shattered remains of a church; but he would perceive no building. In short, the word Church is often applied by a figure of speech in which a part is taken for the whole, to any portion of the church, even though it may not fully answer to the name.

And all the brethren which are with me - It was usual for Paul to associate with him the ministers of the gospel, or other Christians who were with him, in expressing friendly salutations to the churches to which he wrote, or as uniting with him, and concurring in the sentiments which he expressed. Though Paul claimed to be inspired, yet it would do much to conciliate favor for what he advanced, if others also concurred with what he said, and especially if they were known to the churches to which the epistles were written. Sometimes the names of others were associated with his in the Epistle; see the 1-Corinthians 1:1 note; Philippians 1:1 note; Colossians 1:1 note; 1-Thessalonians 1:1 note. Since we do not know where this epistle was written, of course we are ignorant who the "brethren" were, who are here referred to. They may have been ministers with Paul, or they may have been the private members of the churches. Commentators have been much divided in opinion on the subject; but all is conjecture. It is obviously impossible to determine.
Unto the churches - How many churches there were in Galatia is unknown. There were several cities in Galatia, as Ancyria, Tavia, Pessinus, etc. It is not improbable that a church had been established in each of the cities, and, since they were not far distant from each other, and the people had the same general character and habits, it is not improbable that they had fallen into the same errors. Hence, the Epistle is directed to them in common.

And all the brethren which are with me - It is very likely that this refers to those who were his assistants in preaching the Gospel, and not to any private members of the Church.
Churches of Galatia - Galatia was a region or province of Asia Minor; there was neither city nor town of this name. See the preface. But as, in this province, St. Paul had planted several Churches, he directs the epistle to the whole of them; for it seems they were all pretty nearly in the same state, and needed the same instructions.

And all the brethren which are with me,.... Meaning either the brethren of the church where he was when he wrote this epistle, who were children of the same Father, regenerated by the same grace, belonged to the same family and household of God, and were heirs together of the grace of life; or else his fellow ministers, who were assisting to him in his work, and were companions with him in his travels, and whom he sometimes mentions by name and joins with him in his epistles, as Sosthenes, Silvanus, and Timothy; and the rather he takes notice of the brethren here, whoever are meant, to show that they agreed with him in the doctrines of grace he defends, and in the charges he brought against this church, and in the reproofs and advice he gave them; which he might suppose, and hope, would have the greater weight and influence upon them;
unto the churches of Galatia; Galatia was a country in the lesser Asia, inhabited by the Gauls, who coming thither out of Europe, mixed with the Grecians; whence it was first called Gallo Graecia, and afterwards Galatia; See Gill on Acts 16:6. The metropolis of it, as Pliny (b) says, was formerly Gordium, and the chief towns or cities, according to him, were Ancyra, Tavium, and Pessinus; and in some, or all of these places, it is very probable, were the churches here mentioned; See Gill on Acts 18:23. It seems there were more than one in this country; for the primitive churches were not national nor provincial, but congregational, consisting of persons called out of the world, and joined together in holy fellowship and who walked in the commandments and ordinances of the Lord: and though these churches had many among them that were disorderly, and were swerving from the faith of the Gospel, yet were not unchurched, but honoured still with the name of churches, there being no perfection to be expected in this state of things; as not in particular persons, so not in congregated bodies and societies; though it is observed by some, that they are barely called churches, without any additional epithets, as churches of God, beloved of God, called to be saints, faithful and sanctified in Christ, which are bestowed on other churches; whereby the apostle is thought to show his indignation and resentment at their principles and practices. For quickly after the Gospel was preached unto them, false teachers crept in among them, endeavouring to subvert it, by mixing it with the law, and joining Moses and Christ; and in which they very much succeeded; and is the reason of the apostle's writing this epistle.
(b) Nat. Hist. l. 5. c. 32.

all the brethren--I am not alone in my doctrine; all my colleagues in the Gospel work, travelling with me (Acts 19:29, Gaius and Aristarchus at Ephesus: Acts 20:4, Sopater, Secundus, Timotheus, Tychicus, Trophimus, some, or all of these), join with me. Not that these were joint authors with Paul of the Epistle: but joined him in the sentiments and salutations. The phrase, "all the brethren," accords with a date when he had many travelling companions, he and they having to bear jointly the collection to Jerusalem [CONYBEARE and HOWSON].
the churches--Pessinus and Ancyra were the principal cities; but doubtless there were many other churches in Galatia (Acts 18:23; 1-Corinthians 16:1). He does not attach any honorable title to the churches here, as elsewhere, being displeased at their Judaizing. See First Corinthians; First Thessalonians, &c. The first Epistle of Peter is addressed to Jewish Christians sojourning in Galatia (1-Peter 1:1), among other places mentioned. It is interesting thus to find the apostle of the circumcision, as well as the apostle of the uncircumcision, once at issue (Galatians 2:7-15), co-operating to build up the same churches.

And all the brethren - Who agree with me in what I now write.