John Chrysostom

"But ye did not so learn Christ," he continues, "if so be that ye heard Him, and were taught in Him even as truth is in Jesus."

The expression, "If so be that ye heard Him," is not that of one doubting, but of one even strongly affirming: as he also speaks elsewhere, "If so be that it is a righteous thing with God to recompense affliction to them that afflict you." That is to say, It was not for these purposes that "ye learned Christ."

This then surely is to learn Christ, to live rightly; for he that lives wickedly knows not God, neither is known of Him; for hear what he saith elsewhere, "They profess that they know God, but by their works they deny Him."