That obedience leads to righteousness means
obedience leads to moral conduct that is pleasing to God; or
obedience leads to righteousness in eternal life.
Paul has in mind that obedience to God leads to right moral conduct. We can detect this for two reasons. First, the immediate context suggests that Paul has behaviour in mind. Romans 6:16 is a response to the rhetorical question, Are we to sin if we are under grace?
(Romans 6:15). The question suggests that Paul has behaviour in mind, because being under grace seems to imply that behaviour is irrelevant. Further, we notice Paul refers to becoming a slave of righteousness in Romans 6:18, where behaviour is implied. Second, Paul has already referred to something like the righteousness of obedience in Romans 2:13, when he refers to the doers of the law being justified. He does not say that obedience leading to righteousness will lead to justification; rather, he says that obedience leads to right moral behaviour.
Some contend that when Paul refers to the obedience of righteousness, he has in mind obeying the gospel in faith, which leads to eternal life. These point out that Paul refers to the obedience of faith in both Romans 1:5 and Romans 16:26. Further, we know from Romans 3:20 that one is justified not by works of the law but through faith in Jesus Christ. Thus, the obedience of putting one’s faith in Jesus Christ, rather than doing the works of the law, leads to righteousness in the sense of eternal life. Further, there seems to be a parallel between sin leading to death and obedience leading to righteousness, where death is eternal separation from God. If sin leads to eternal separation from God, then obedience must lead to eternal life with God.
The problem with this view is that Paul not only refers to obedience in the sense of obedience of faith, but he also refers to obedience in the sense of behaviour (Romans 5:19; Romans 15:18; Romans 16:19). This means we cannot decide on Paul’s meaning of obedience from the fact that he refers to obedience of faith elsewhere, because he also refers to obedience in terms of behaviour. Thus, we need the immediate context to help us decide between these. Further, while there is some parallel between sin leading to death and obedience leading to righteousness, the parallel may well be that sin leads to a negative, which is eternal separation from God, while obedience leads to a positive, which is upright living.
In the end, the context suggests that when Paul refers to obedience leading to righteousness, he has in mind obedience leading to right moral conduct.
Interpretation 1:
Obedience leads to moral conduct that is pleasing to God.
Summary:
Paul explains that if one is obedient to sin, this leads to spiritual death. On the other hand, if one submits in obedience to God, his conduct will be morally upright and pleasing to God.
Christians have a choice. They can either align with their sinful nature, which leads to death, or by the power of the Holy Spirit they can resist sin and live lives of obedience, leading to proper moral conduct.
Advocates:
James Dunn
Richard Longenecker
Douglas Moo
Frank Thielman
Minor differences:
Our authors generally agree that obedience leading to righteousness has to do with obedience that leads to moral conduct that is pleasing to God.
James Dunn explains that Paul does not have works righteousness in mind here when he says that obedience leads to righteousness. Rather, he has in mind the notion that the end product of obedience is righteousness, even if this obedience is enabled by God.1
Douglas Moo helps clarify what Paul might specifically mean by righteousness,
explaining that it likely has to do with moral righteousness in the sense of conduct that is pleasing to God.2
Arguments
Possible weaknesses
Interpretation 2:
Obedience of faith leads to righteousness in eternal life.
Summary:
Paul explains that being a slave to sin leads to eternal destruction. On the other hand, being a slave to the call of the gospel, that is, being obedient to faith, leads to life everlasting.
Advocates:
John MacArthur
Leon Morris
Thomas Schreiner
Minor differences:
Our authors seem to agree that when Paul refers to obedience leading to righteousness, he has in mind that obeying the gospel in faith leads to eternal life.
Leon Morris is clear that the obedience Paul has in mind is obedience to the gospel call, which means having faith. According to him, this obedience leads to right living, and the righteousness of the new heavens and earth.7
For Thomas Schreiner, the righteousness Paul has in mind is simply the righteousness that comes at the end of time. Schreiner concludes this by suggesting that the death that sin leads to is eternal death. Thus, the righteousness that obedience leads to must be end-of-time righteousness.8
John MacArthur’s view is somewhat vague compared to our other authors, stating that righteousness is the inescapable mark of eternal life.
9 Unfortunately, it is not clear what it means for obedience to lead to the inescapable mark of eternal life.
Arguments
Possible weaknesses
16 Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness?