John Chrysostom
What I said above, I will say again now.
In Romans the apostle often passes to moral exhortation, but not as in the other epistles, which he divides into two parts.
In those, he assigns the first part to dogmatic teaching and the second to care for morals.
Here it is not so. He does this alternately throughout the whole epistle, so that his word may be well received.
Therefore he says here that there are two mortifications and two deaths.
One mortification is accomplished by Christ in baptism. The other must be accomplished by us through our activity after baptism.
That our former sins are buried in baptism is Christ's gift. But remaining dead to sin after baptism must be the work of our own care.
Even here, as we shall see, God helps us most of all.
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Baptism has power not only to wipe away former sins, but also to protect against future ones.
As you offered faith for the wiping away of former sins, so you must show a change in zeal, in order not to be defiled again by sins after baptism.
Advising this very thing, the apostle says, "For if we have been united with Him in the likeness of His death, we shall also be united with Him in the likeness of His Resurrection."
Do you see how he raised the hearer, leading him directly to the Lord Himself and striving to prove a great likeness with Him?
And so that you would not object, the apostle did not say "death," but "likeness of death," because the essence itself did not die in you.
Rather, the sinful man died, that is, wickedness.
Nor did the apostle say, "If we have shared in the likeness of death." What does he say? "For if we have been united," literally, "planted together with Him."
By the word "planting" he alludes to its fruit in us.
As Christ's body, buried in the earth, bore fruit, the salvation of the world, so our body, buried in baptism, bore fruit.
It bore righteousness, sanctification, adoption, and countless blessings. Later it will also bear the gift of resurrection.
And since we are buried in water, but Christ in the earth, you with respect to sin, and He in the body, the apostle did not say, "we were planted together with death."
He said, "with the likeness of death," because, though both are death, they do not concern one and the same thing.
"For if we have been united with Him in the likeness of His death," he says, "we shall also be united with Him in the likeness of His Resurrection."
Here he means the future resurrection.
Above, when he was reasoning about death and said, "Do you not know, brethren, that all of us who were baptized into Christ Jesus were baptized into His death?" he said nothing clear about resurrection.
Instead, he spoke about life after baptism, commanding us to "walk in newness of life."
Here, using the same expression, he already foretells to us the future resurrection.
So that you may understand that the apostle speaks precisely of the future resurrection, and not of resurrection in baptism, observe what he says.
After saying, "For if we have been united with Him in the likeness of His death," he did not say that we shall be planted together with the likeness of the Resurrection.
He simply says, "we shall also be of the Resurrection."
So that you would not object, "If we did not die as Christ died, how shall we rise as He rose?" the apostle makes a distinction.
When he mentioned death, he did not say, "planted together with death," but "with the likeness of death."
But when he speaks of resurrection, he did not say, "with the likeness of resurrection," but "we shall also be of the Resurrection itself."
And again, he did not say, "we were," but "we shall be," indicating by these words not a resurrection already past, but the future resurrection.