Christ dies to sin in the sense that
he was subject to death in that he became a human in the age of Adam; or
he paid the penalty for sin.
Most likely, Paul has in mind that death is the ruling power of sin, and Christ subjected himself to death in order to associate fully with humanity. We can detect this is Paul’s meaning because he uses the same phrase in Romans 6:2 when he writes that believers died to sin. His point there was that believers are no longer under the ruling authority of sin and death because they have died to sin’s control. Likewise, when Christ died, he put to death the reign of death, that is, he died to sin. Further, we know that Christ is the redeemer, and he accomplishes redemption by sharing in the oneness of humanity. Of course, humans are subject to the reign of death through sin, so Christ likewise subjected himself to death in order to free humanity from the controlling power of sin.
Some contend that Christ died to sin in the sense that he took on the penalty for sin. The idea here is that sin has no mastery over Christ, nor is Christ tempted to sin, so there is no real sense in the notion of Christ dying to the dominion of sin. Still, in order to set us free from the power of sin, Christ subjected himself to the penalty of sin, so in the sense that Christ subjected himself to the penalty of sin, he died to sin.
The problem with this view is that Paul says in Romans 6:9 that when Christ died, death no longer had dominion over him, which suggests that death previously did have dominion over him. Further, we know that Christ accomplished his redemptive work by sharing in the condition of humanity, and actual sin is not a condition of humanity; death is. This means that in order to redeem sinners from the power of sin, Christ had to die to the power of sin, thus breaking the dominion of death.
So, when Paul writes that Christ died to sin, he means that Christ entered the human condition, which subjected himself to the dominion of sin, which is death.
Interpretation 1:
Christ was subject to death in that he became a human in the age of Adam.
Summary:
Christ embodied human flesh during the old age when sin and death had dominion over humanity. Since Christ was human, he was under the power of death. Still, his death broke the power of sin so that his death to sin defeated the dominion of sin.
Christ goes before us, transforming the possibilities of our future in a deep and profound way. That is, by dying to sin, Christ destroys the dominion of sin so that death no longer reigns over us. And since death no longer reigns over us, we are confident in our hope for eternal life.
Advocates:
James Dunn
Douglas Moo
Thomas Schreiner
Minor differences:
Our authors agree that Paul has in mind that dying to sin has to do with death reigning over Christ because he took on human flesh in the old age.
James Dunn explains that sin reigning over human life is demonstrated by the fact that all die. Since Jesus shared the human condition, he was subordinate to the power of sin in death. Because he shared in the human condition to the full, when he broke the reign of sin through his death, that reign was broken for all humanity.1
Douglas Moo characterizes things slightly differently. He says that because Christ fully identified with humanity, death had authority
over him. Since death is the ruling power of sin, and the old man was subject to death and therefore sin, Paul could say that Christ was subject to the power of sin in that he was subject to death.2
Arguments
Possible weaknesses
Interpretation 2:
Christ paid the penalty for sin.
Summary:
There is a penalty for sin, and although Christ never sinned, he took the penalty for sin upon himself. Thus, Christ died to sin in the sense that he carried the penalty for sin.
Advocates:
John MacArthur
Arguments
Possible weaknesses
10 For the death he died he died to sin, once for all, but the life he lives he lives to God.