What does Romans 7:3 mean?
Earlier, the book of Romans mentioned that salvation in Christ involves a kind of spiritual "death." The prior context was in turning from sin, and instead choosing to be alive in Christ. Here, Paul is explaining how this same idea means freedom from the obligations of the law. This verse concludes an idea begun in the previous verse. It is an illustration of Paul's point that someone who has died is no longer bound to follow the law of Moses.To show this, he points to the "law of marriage" that binds two people together. Paul has written that a married woman is released from this law if her husband dies. Now he repeats this idea, adding that if a woman lives with another man while she is still married, she will be known as an adulteress. If her husband dies, however, the law no longer holds her. She is free to marry another man.
Paul will again state, in the following verse, that Christians have died in a spiritual sense, freeing us from our spiritual obligation to the law.