If so be that ye have heard him - If you have listened attentively to his instructions, and learned the true nature of his religion. There may be a slight and delicate doubt implied here whether they had attentively listened to his instructions. Doddridge, however, renders it, "Seeing ye have heard him;" compare notes on Ephesians 3:2.

And have been taught by him - By his Spirit, or by the ministers whom he had appointed.

As the truth is in Jesus - If you have learned the true nature of his religion as he himself taught it. What the truth was which the Lord Jesus taught, or what his principles implied, the apostle proceeds to state in the following verses.

If so be that ye have heard him - Ειγε, Seeing that, since indeed, ye have heard us proclaim his eternal truth; we have delivered it to you as we received it from Jesus.

If so be that ye have heard him,.... Not heard him preach, but heard him preached; and that not merely externally, with the outward hearing of the ear; though oftentimes spiritual conviction and illumination, true faith in Christ, real comfort from him, and establishment and assurance of interest in him, come this way, as to these Ephesians, Ephesians 1:13 but internally, so as to know him, understand his word, and distinguish his voice; so as to approve of him and love him, and believe in him; feel the power of his Gospel, relish his truths, and obey his ordinances, and so bring forth fruit to his glory; as such do, who are quickened by him, whose ears are unstopped, and their hearts opened, and their understandings enlightened; and who have hearing ears, and understanding hearts given them:

and have been taught by him: not personally, but by his Spirit and ministers; for Christ is not only the subject of the ministry of the word, and whom the Spirit of God teaches and directs souls to for righteousness, pardon, cleansing, and for every supply of grace; but he is the efficient cause of teaching; and there is none who teaches like him: and those who are taught by him, are taught

as the truth is in Jesus; as the Gospel is in him, as in its original and subject; for he is truth itself, and grace and truth came by him; and as it was preached by him, and so is pure and unmixed.

If so be that ye heard Him (εἴ γε αὐτὸν ἠκούσατε)

The indicative mood implies the truth of the supposition: if ye heard as ye did. Him is emphatic. If it was Him that ye heard. Compare John 10:27.

By Him (ἐν αὐτῷ)

Rev., correctly, in Him. In fellowship with.

As the truth is in Jesus (καθώς ἐστιν ἀλήθεια ἐν τῷ Ἱησοῦ)

As corresponds with not so. Ye did not in such a manner learn Christ if ye were taught in such a manner as is truth, etc. Render, as Rev., as truth is in Jesus. Schaff paraphrases: "If you were taught so that what you received is true as embodied in the personal Savior." "Taught in the lines of eternal fact and spiritual reality which meet in him" (Moule). Jesus is used rather than Christ: the historical rather than the official name. The life of Christianity consists in believing fellowship with the historic Jesus, who is the Christ of prophecy.

If so be that ye have heard him, and have been taught by him, {d} as the truth is in Jesus:

(d) As they have learned who acknowledge Christ indeed, and in good earnest.

4:21 If so be that ye have heard him, and have been taught by him. This does not express a doubt that they had heard and been taught by Christ. The idea is: If ye have heard, etc. as I know you have, you have been taught the truth in Jesus.

4:21 Seeing ye have heard him - Teaching you inwardly by his Spirit. As the truth is in Jesus - According to his own gospel.

21. If so be that-not implying doubt; assuming what I have no reason to doubt, that

heard him-The "Him" is emphatic: "heard Himself," not merely heard about Him.

taught by him-Greek, "taught IN Him," that is, being in vital union with Him (Ro 16:7).

as the truth is in Jesus-Translate in connection with "taught"; "And in Him have been taught, according as is truth in Jesus." There is no article in the Greek. "Truth" is therefore used in the most comprehensive sense, truth in its essence, and highest perfection, in Jesus; "if according as it is thus in Him, ye have been so taught in Him"; in contrast to "the vanity of mind of the Gentiles" (Eph 4:17; compare Joh 1:14, 17; 18:37). Contrast Joh 8:44.

4:17-24 The apostle charged the Ephesians in the name and by the authority of the Lord Jesus, that having professed the gospel, they should not be as the unconverted Gentiles, who walked in vain fancies and carnal affections. Do not men, on every side, walk in the vanity of their minds? Must not we then urge the distinction between real and nominal Christians? They were void of all saving knowledge; they sat in darkness, and loved it rather than light. They had a dislike and hatred to a life of holiness, which is not only the way of life God requires and approves, and by which we live to him, but which has some likeness to God himself in his purity, righteousness, truth, and goodness. The truth of Christ appears in its beauty and power, when it appears as in Jesus. The corrupt nature is called a man; like the human body, it is of divers parts, supporting and strengthening one another. Sinful desires are deceitful lusts; they promise men happiness, but render them more miserable; and bring them to destruction, if not subdued and mortified. These therefore must be put off, as an old garment, a filthy garment; they must be subdued and mortified. But it is not enough to shake off corrupt principles; we must have gracious ones. By the new man, is meant the new nature, the new creature, directed by a new principle, even regenerating grace, enabling a man to lead a new life of righteousness and holiness. This is created, or brought forth by God's almighty power.