you are sure you are a guide for the blind, a light for those in the dark,
In context
17Now then: you call yourself a Jew, you lean on the law, you boast in God; 18you know his will, and you can tell what truly matters, because the law has trained you; 19you are sure you are a guide for the blind, a light for those in the dark, 20an instructor of the foolish, a teacher of the immature, since in the law you have the very shape of knowledge and truth. 21Then you who teach others—do you not teach yourself? You preach against stealing—do you steal?
