Ephesians 4:21 - Matthew Poole's English Annotations on the Holy Bible

If so be that ye have heard him; either heard Christ speaking to you in the gospel, Hebrews 12:25, and then the sense will be the same as in the following clause; or heard him preached to you, and then it may refer to the outward hearing of the word. And have been taught by him; or taught in him; in or by, as Colossians 1:16 Hebrews 1:2; and then this relates to the power of the word, and the impression made by it upon the heart: q.d. If ye have not only heard of him by the hearing of the ear, but have been effectually taught by the Spirit to know him, and receive his doctrine, Isaiah 54:13 1 Thessalonians 6:45. As the truth is in Jesus; as it really is, and hath been taught by Christ himself, both in his doctrine and example, viz. what is the true way of a Christian's living; as in the following verses: see 1 Thessalonians 17:17 Titus 1:1.