As 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 as 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.

{a} "Galatia" Ac 16:6; 18:23