And knowest his will, and approvest the things that are more excellent, being instructed ( κατηχούμενος, which implies regular training, whether catechetically in youth, or through rabbinical and synagogic teaching) out of the Law. So far the Jew's own claims on the ground of his own position have been touched on; what follows expresses his attitude with regard to others. We may observe throughout a vein of irony.
And art confident that thou thyself art a guide of the blind, a light of them which are in darkness, an instructor of the foolish, a teacher of babes, having the form of knowledge and of the truth in the Law. Here the form ( μόρφωσις) does not mean the mere outward show, but the real representation in concrete form of knowledge and truth. The Jew had that; and the Law itself is by no means disparaged because the Jew presumed on it without keeping it (cf. Romans 7:12).