How do we know the law is not a rule of life for Christians?

Several passages clarify that the believer’s relationship to the law is fundamentally changed through faith in Christ. Romans 6:14 states that sin will not have dominion over believers because they are not under the law but under grace. This underscores a different paradigm: rather than adhering to the law for righteousness, believers are called to live out their faith through the Spirit's leading. Furthermore, Galatians 5:18 states that being led by the Spirit means one is not under the law, reinforcing this significant shift from law to grace.