For ye have heard of my conversation in time past,.... His manner and course of life, in his state of unregeneracy, how diametrically opposite his education and behaviour, his principles and practices, were to the Gospel; which show that he had not received it, nor was he taught it of men.
This they might have heard of, either from himself, when he first preached among them, who was very free to acknowledge his former sins and errors; or from the Jews, who were scattered abroad in the several countries; and it may be, from them, who were forced to fly to strange cities, and perhaps to some in Galatia, on account of his persecution: now his life and conversation, before his conversion, were spentin the Jews' religion; or "in Judaism".