If so be, &c.— Forasmuch as, or seeing ye have heard him, &c. See ch. Ephesians 3:2. Beza, Gataker, and others, translate and connect this and the preceding verse as follows: But it is not so with you; you have learned Christ; for ye have heard of him, &c.
Related Commentaries of Ephesians 4:21
Ephesians 4:21
21 If so be that ye have heard him, and have been taught by him, as the truth is in Jesus: