How do we know the doctrine of faith righteousness is true?

We know the doctrine of faith righteousness is true because it is firmly rooted in Scripture. Paul articulates this truth in Romans 10, where he contrasts faith righteousness and law righteousness, emphasizing that law demands perfect adherence without any reprieve. Meanwhile, faith righteousness acknowledges our inability to satisfy the law and points us to Christ, who fulfilled the law on our behalf. Furthermore, in Galatians 3, Paul reiterates that those who rely on the works of the law are under a curse, hence making it clear that only through faith in Christ can we achieve true righteousness. The consistent message throughout the Scriptures affirms this doctrine is of God and not of human effort.