How do we know that justification comes through faith and not the Law?

We know that justification comes through faith rather than works of the Law because the Law ultimately reveals our inability to attain righteousness on our own. Paul highlights in Galatians that 'no one is justified before God by the law,' illustrating that adherence to the Law cannot save us. Instead, justification is a promise received by faith in Jesus Christ, who became a curse for us by fulfilling the Law's requirements. Thus, our standing before God relies entirely on faith and the completed work of Christ, rather than our own efforts.