Marriage
Paul uses the metaphor of marriage to illustrate the believer's relationship to the law. Just as a woman is bound to her husband as long as he lives, believers were bound to the law until they died to it through Christ.
This symbol highlights the transition from the old covenant of the law to the new covenant of grace through Christ. It underscores the believer's freedom from the law's condemnation and the new life in the Spirit.
In Jewish culture, marriage was a binding covenant, reflecting the seriousness of the law's demands and the permanence of the new covenant in Christ.