Ephesians 4:21

21 when you heard about Christ and were taught in him in accordance with the truth that is in Jesus.

Ephesians 4:21 in Other Translations

KJV
21 If so be that ye have heard him, and have been taught by him, as the truth is in Jesus:
ESV
21 assuming that you have heard about him and were taught in him, as the truth is in Jesus,
NLT
21 Since you have heard about Jesus and have learned the truth that comes from him,
MSG
21 My assumption is that you have paid careful attention to him, been well instructed in the truth precisely as we have it in Jesus.
CSB
21 assuming you heard Him and were taught by Him, because the truth is in Jesus:

Ephesians 4:21 Meaning and Commentary

Ephesians 4:21

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.

Ephesians 4:21 In-Context

19 Having lost all sensitivity, they have given themselves over to sensuality so as to indulge in every kind of impurity, and they are full of greed.
20 That, however, is not the way of life you learned
21 when you heard about Christ and were taught in him in accordance with the truth that is in Jesus.
22 You were taught, with regard to your former way of life, to put off your old self, which is being corrupted by its deceitful desires;
23 to be made new in the attitude of your minds;