The Death And Resurrection.
For if we have been united together in the likeness of His death, certainly we also shall be in the likeness of His resurrection, Romans 6:5 NKJV
For if we have been ingrafted, etc. He strengthens in plainer words the argument he has already stated; for the similitude which he mentions leaves now nothing doubtful, inasmuch as grafting designates not only a conformity of example, but a secret union, by which we are joined to him; so that he, reviving us by his Spirit, transfers his own virtue to us. Hence as the graft has the same life or death in common with the tree into which it is ingrafted, so it is reasonable that we should be partakers of the life no less than of the death of Christ; for if we are ingrafted according to the likeness of Christ's death, which was not without a resurrection, then our death shall not be without a resurrection. But the words admit of a twofold explanation, -- either that we are ingrafted in Christ into the likeness of his death, or, that we are simply ingrafted in its likeness. The first reading would require the Greek dative homoiomati, to be understood as pointing out the manner; nor do I deny but that it has a fuller meaning: but as the other harmonizes more with simplicity of expression, I have preferred it; though it signifies but little, as both come to the same meaning. Chrysostom thought that Paul used the expression, "likeness of death," for death, as he says in another place, "being made in the likeness of men." But it seems to me that there is something more significant in the expression; for it not only serves to intimate a resurrection, but it seems also to indicate this -- that we die not like Christ a natural death, but that there is a similarity between our and his death; for as he by death died in the flesh, which he had assumed from us, so we also die in ourselves, that we may live in him. It is not then the same, but a similar death; for we are to notice the connection between the death of our present life and spiritual renovation.
Ingrafted. There is great force in this word, and it clearly shows, that the Apostle does not exhort, but rather teach us what benefit we derive from Christ; for he requires nothing from us, which is to be done by our attention and diligence, but speaks of the grafting made by the hand of God. But there is no reason why you should seek to apply the metaphor or comparison in every particular; for between the grafting of trees, and this which is spiritual, a disparity will soon meet us: in the former the graft draws its aliment from the root, but retains its own nature in the fruit; but in the latter not only we derive the vigor and nourishment of life from Christ, but we also pass from our own to his nature. The Apostle, however, meant to express nothing else but the efficacy of the death of Christ, which manifests itself in putting to death our flesh, and also the efficacy of his resurrection, in renewing within us a spiritual nature. - John Calvin