How do we know that righteousness comes through faith in Christ?

The Apostle Paul emphasizes in Romans 10 that righteousness is not achieved through human effort or adherence to the law but is instead received as a free gift through faith in Jesus Christ. The verse highlights that Christ's work fulfills the law, thereby transferring righteousness to those who put their trust in Him. This is further supported in Philippians 3:9, where Paul describes being found in Christ, not having a righteousness of his own but that which comes through faith in Christ. This aligns with the theme of imputed righteousness, where believers receive Christ's perfect obedience as a gift, thus standing just before God.