And knowest his will, and approvest the things that are more excellent, being instructed out of the law; Knowest his will - Hast been favored with a revelation of his own will, immediately from himself.
The things that are more excellent - τα δισφεροντα, The things that differ - that revelation which God has given of himself makes the nicest distinctions between right and wrong; between vice and virtue; showing how you should walk so as to please God, and, consequently, acquire the most excellent portion that human spirits can have on this side heaven: for all these blessings ye acknowledge to receive from your law, being instructed, κατηχουμενος, being catechized, from your infancy, in the knowledge of Divine things.