17 But if you call yourself a Jew and ^drely on the law and boast in God 18 and know his will and approve what is excellent, because you are instructed from the law; 19 and if you are sure that you yourself are ^ea guide to the blind, a light to those who are in darkness, 20 an instructor of the foolish, a teacher of children, having in the law ^fthe embodiment of ^gknowledge and truth— 21 ^hyou then who teach others, do you not teach yourself? While you preach against stealing, do you steal?