Do we see this as a command from Paul or as a past event? Can we equate old nature/new nature with old man/new man?This is my own understanding of this passage. I do not speak for John MacArthur. (he will be relieved to hear this. :-) )Eph. 4:20 But ye have not so learned Christ; Eph. 4:21 If so be that ye have heard him, and have been taught by him, as the truth is in Jesus: Eph. 4:22 That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; Eph. 4:23 And be renewed in the spirit of your mind; Eph. 4:24 And that ye put on the new man, which after God is created in righteousness and true holiness. I have taken the passage from two verses earlier to get the sense of what Paul is saying here. He is saying that they had been taught, by him (Christ), as the truth is in Jesus... This itself is a powerful statement, but that 'that' in the beginning of verse should not really be there; it has been 'supplied' by the translators, and the verb for 'putting off' is 2nd Aorist infinitive. The significance of the last point is that we might have expected to find this as an imperative if Paul were telling them that they should do it now. (that is a bit technical. If you would like more explanation, please ask.) If fact, if we drop that 'that' we can read something like......you were taught by him, to put off, concerning the former way of life, the old man.Read in this way it becomes the original instruction given, by Christ, to those who have learned from Him. The original instruction then was to "put off, concerning the former way of life, the old man." I think it is important to note that they had not been instructed not only to 'put off the old man' but to 'put of, concerning the former way of life, the old man. that is, the old man and his ways. I think the sense is carried in Col. 3:9 Lie not one to another, seeing that ye have put off the old man with his deeds; The verb for 'put off' here is different, meaning to 'strip off, away from yourself'. It is part of three uses of the idea in Colossians;Col. 2:11 In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ: Col. 2:15 And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it. Col. 3:9 Lie not one to another, seeing that ye have put off the old man with his deeds; where the verb and its noun are repeated. The verb in Col 3:9 is an Aorist participle and the sense is caught perfectly by the KJV; you have put off, or as Youngs Literal has it: “Lie not one to another, having put off the old man with his practices,”(Col. 3:9, YNG)It seems to me that Ephesians is reminding them of what they were taught by Christ; to put off, concerning the former way of life, the old man; whereas Colossians is reminding them of what they have already done. the 'old nature' is a theological term rather than a biblical concept so I personally prefer to use the phrase 'old man' and 'new man' rather than theological concepts of 'nature' and 'self'.ps the putting on the the 'new man' in Eph 4:24 is also Aorist Infinitive, and would also seem to refer to something happening at a point in time rather than as a process. However, and this is vital, the 'be renewed in the spirit of your mind' is out of step with the verbs which surround it. Both putting off the old and putting on the new are Aorist Infinitives, but 'be renewed' is present tense. Present tense in Bible Greek is more like our present continuous, hence this 'out of step' instruction that they received from Christ means that 'they were taught... to be being renewed in the spirit of their minds'. This is quite definitely... process.“And have put on the new man, which is renewed in knowledge after the image of him that created him:”(Col. 3:10, KJVS) Here in 'put on' is Aorist participle ie 'having put on the new' but the 'is renewed' is again a present participle which speaks of process. Hence the sense is "having put on the new man which is being renewed according to the image of him having created him." So the 'creation' of the new man is seen as having been accomplished, but the renewal of that same new man is a constant process.The two transcipts provided below by Nasher are very interesting. Perhaps we can talk later about John MacArthurs' "smelly old coat"?