Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that we should no longer serve sin.
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Ambrose of Milan
AD 397
Until this price was paid for all men by the shedding of the Lord’s blood for the forgiveness of all, blood was required of each man who by the law and the customary rite was following the holy precepts of religion. Since the price has been paid for all after Christ the Lord suffered, there is no longer need for the blood of each individual to be shed by circumcision, for in the blood of Christ the circumcision of all has been solemnized, and in his cross we have all been crucified with him and buried together in his tomb and planted together in the likeness of his death that we may no longer be slaves of sin.
Paul underlines and repeats a good deal in order to teach the baptized that they must not sin and above all that they must not return to idolatry, which is a very serious crime and the root of all errors, lest they lose the grace which they have received through Christ. He calls our former behavior “our old self” because, just as the man who has a pure life through Christ and faith in him is said to be new, so the same man is said to be old through unbelief and evil deeds. Paul says that these deeds have been crucified, which means that they are dead, that the body of sin (i.e., all our misdeeds) has been destroyed. Paul calls all our sins a body, which he says has been destroyed by a good life and by orthodox belief. Commentary on Paul’s Epistles.
This refers to Deuteronomy [:]: “Cursed be every man hanged from a tree.” For as the crucifixion of the old man is symbolized in the cross of the Lord, so the rebirth of the new man is signified in the resurrection. It is clear that according to Paul we are in the place of the old man who is accursed. No one doubts that it was because of him that the Lord was called “sin,” because “he bore our sins” and “he was made sin for us,” and “by sin he condemned sin”.
By these words we are taught that he who is baptized in Christ is baptized in his death and is not only buried with Christ and planted together with him but is first of all crucified with him. Thus we are instructed that, as he who is crucified is separated from the living, so also he who has been crucified with Christ in the likeness of his death is completely set apart from those who live according to the old man.
But to us the apostle says, "Now we know this, that our old man is crucified with Him, that the body of sin might be destroyed, that henceforth we should not serve sin.".
For "to bring themselves into captivity "and to slay themselves, putting to death "the old man, who is through lusts corrupt "and raising the new man from death, "from the old conversation "by abandoning the passions, and becoming free of sin, both the Gospel and the apostle enjoin.
Perhaps some people will think that “the body of sin” is meant to refer to our earthly flesh, which has been joined to the soul as a kind of punishment, in that the soul sinned before bodies were created. Some people think and talk like this, but as it is a pagan idea we must reject it as being incompatible with the truth. Therefore, Paul says that our earthly body is the body of sin and our old man, because it has inherited the necessity of corruption from the old Adam…. Moreover, because of its weakness it has contracted a love for wickedness, and thus sin appears in the flesh as a congenital defect. We were crucified with Christ at the moment when his flesh was crucified, because it somehow included universal human nature in itself, just as universal human nature contracted the sickness of the curse in Adam at the same time that he incurred the curse. .
Get for yourself none of the things that are on earth, and do not be active in the affairs of the present life. For your life is hidden now and unseen by those who do not believe, but the time will come when it will be seen. But now is not your time. Since you have died once for all, refuse to mind the things that are on earth. The greatness of your virtue is seen especially when you have prevailed over the arrogance of the flesh and act toward the good things of the world just as if you were dead to this life.
Paul does not say that we have been crucified but that we have been crucified “with him,” thus linking baptism with the cross. … You are dead not in the sense that you have been obliterated but in the sense that now you can live without sin.
This refers not to our body structure but to our moral behavior…. It is not our bodily frame which has been transformed, nor has our flesh endured the cross of Christ. The sinful body is destroyed by amendment of life, not by the destruction of our fleshly substance.
For that must be living after the world, which, as the old man, he declares to be "crucified with Christ".
Besides, if we do not understand it in this sense, it is not our bodily frame which has been transfixed (at all events), nor has our flesh endured the cross of Christ; but the sense is that which he has subjoined, "that the body of sin might be made void, ".
by an amendment of life, not by a destruction of the substance, as he goes on to say, "that henceforth we should not serve sin; "
After showing that we should not continue to sin after baptism has made us dead to sin [n. 470], the Apostle now shows that we have the means to do this. Concerning this he does two things. First, he indicates the benefit we have received; secondly, the effect of this benefit [v. 7; n. 482]. Concerning this he does two things. First he sets out the benefit we obtain; Second, the effect of this benefit [v. 6b; n. 481]. 479. First, therefore: We have said that the baptized should walk in newness of life. To anyone who says that this is impossible he responds that we know our old self, i.e., the oldness caused by sin, was crucified with him, i.e., put to death by the Cross of Christ. For as was stated above, man’s oldness was brought about by sin -- in the sense that the goodness of his nature was corrupted by sin -- and is predominant as long as he continues in sin. But because what is predominant in a man characterizes the man himself, it follows that the oldness of sin in a man subject...
