Romans 2:17-20

Common(i) 17 But if you call yourself a Jew, and rely on the law and boast of your relation to God 18 and know his will and approve of what is excellent, because you are instructed in the law, 19 and if you are sure that you are a guide to the blind, a light to those who are in darkness, 20 an instructor of the foolish, a teacher of infants, having in the law the embodiment of knowledge and truth