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, (a) in vain.
(a) Unfruitful, for as touching his doctrine, Paul does not doubt it, but because there were certain reports being spread about him, that he was of another opinion than the rest of the apostles were, which thing might have hindered the course of the Gospel. Therefore he labours to remedy this dangerous situation.