“And I went up by revelation, and communicated unto them that gospel which I preach among the Gentiles, but privately to them which were of reputation, lest by any means I should run, or had run, in vain.”
King James Version (KJV)
2:2 I went up - Not by any command from them, but by an express revelation from God. And laid before them - The chief of the church in Jerusalem. The gospel which I preach among the gentiles - #Acts 15:4|, touching justification by faith alone; not that they might confirm me therein, but that I might remove prejudice from them. Yet not publicly at first, but severally to those of eminence - Speaking to them one by one. Lest I should run, or should have run, in vain - Lest I should lose the fruit either of my present or past labours. For they might have greatly hindered this, had they not been fully satisfied both of his mission and doctrine. The word run beautifully expresses the swift progress of the gospel.
Ga 2:2 And I went up by revelation. Because Christ revealed to me that I ought to go. Communicated to them that gospel which I preach among the Gentiles. For at least ten years he had been preaching among the Gentiles with great success, calling upon them to obey the gospel, not the law of Moses. He now explained to the Jerusalem Christians the gospel which he had preached, privately to them who were of reputation, to such men as Peter and James, so that there would be a full understanding before the public meeting described in Ac 15:5-22. Lest by any means I should run, or had run, in vain. Lest his apostolic labor should be made fruitless by the action of the Jewish Christians.