Verse 12. For before that certain came. Some of the Jews who had been converted to Christianity. They evidently observed in the strictest manner the rites of the Jewish religion.

From James. See Barnes "Ga 1:19".

Whether they were sent by James, or whether they came of their own accord, is unknown. It is evident only that they had been intimate with James at Jerusalem, and they doubtless pleaded his authority. James had nothing to do with the course which they pursued; but the sense of the whole passage is, that James was a leading man at Jerusalem, and that the rites of Moses were observed there. When they came down to Antioch, they of course observed those rites, and insisted that others should do it also. It is very evident that at Jerusalem the peculiar rites of the Jews were observed for a long time by those who became Christian converts. They would not at once cease to observe them, and thus needlessly shock the prejudices of their countrymen. See Barnes "Ac 21:21"

also Ac 21:22-25.

He did eat with the Gentiles. Peter had been taught that in the remarkable vision which he saw, as recorded in Ac 10. He had learned that God designed to break down the wall of partition between the Jews and the Gentiles, and he familiarly associated with them, and partook with them of their food. He evidently disregarded the peculiar laws of the Jews about meats and drinks, and partook of the common food which was in use among the Gentiles. Thus he showed his belief that all the race was henceforward to be regarded as on a level, and that the peculiar institutions of the Jews were not to be considered as binding, or to be imposed on others.

But when they were come, he withdrew and separated himself. He withdrew from the Gentiles, and probably from the Gentile converts to Christianity. The reason why he did this is stated. He feared those who were of the circumcision, or who had been Jews. Whether they demanded this of him; whether they encountered him in debate; or whether he silently separated himself from the Gentiles without their having said anything to him, is unknown. But he feared the effect of their opposition; he feared their reproaches; he feared the report which would be made to those at Jerusalem; and perhaps he apprehended that a tumult would be excited, and a persecution commenced at Antioch by the Jews who resided there. This is a melancholy illustration of Peter's characteristic trait of mind. We see in this act the same Peter who trembled when he began to sink in the waves; the same Peter who denied his Lord. Bold, ardent, zealous, and forward, he was at the same time timid and often irresolute; and he often had occasion for the deepest humility, and the most poignant regrets at the errors of his course. No one can read his history without loving his ardent and sincere attachment to his Master; and yet no one can read it without a tear of regret that he was left thus to do injury to his cause. No man loved the Saviour more sincerely than he did, yet his constitutional timidity and irresoluteness of character often led him to courses of life fitted deeply to wound his cause.

{a} "eat with Gentiles" Ac 11:3