<p>4:21 <i>Assuming that you have heard about him and were taught in him, as the truth is in Jesus</i>- Paul wonders whether they had really been taught about the moral dimensions of the Gospel when they first heard it (see on :20). The &quot;you&quot; refers to those whom Paul earlier calls &quot;Gentiles&quot; in :17; he has in view those who had left the faith (see on :17,18). But they were apparently still within the community at Ephesus to whom Paul was writing. &quot;The truth in Jesus&quot; referred to a way of life rather than theological truths of themselves; and Paul may mean that he wonders whether they were any longer aware of that early teaching of the Gospel which they had received. In illiterate societies there would have been a need to keep teaching the message initially preached, and perhaps that had not been done. The Lord's letter to the Ephesians in Rev. 2:1-6 commends them for having rejected false teaching; so it would seem that Paul's appeal here was heeded, but the Lord lamented their lack of love, which was going to lead to their rejection.</p>