Romans 3

Paul affirms God's faithfulness despite Jewish unfaithfulness, quotes Psalms and Isaiah to prove all humanity—Jews and Greeks—are under sin with none righteous, and declares the law stops every mouth and brings knowledge of sin but cannot justify anyone.[1][2] God sets forth Jesus as a propitiation through faith in his blood, demonstrating his righteousness, justifying believers apart from law works, excluding boasting, and upholding the law for both circumcised and uncircumcised.[1][2]