Verses 1-8: The Advantage of the Jew and the Faithfulness of God. Paul opens by affirming the special privileges of the Jews, especially their stewardship of God's oracles, and defends God's faithfulness despite human unbelief and sin.
Verses 9-18: The Universal Condition of Sinfulness. Using Old Testament citations, Paul demonstrates that both Jews and Gentiles are under sin, emphasizing the total depravity of mankind and their inability to do good on their own.
Verses 19-20: The Law’s Role in Revealing Sin. Paul explains that the law serves to make all accountable before God and that no one can be justified by works of the law, but only gains knowledge of sin.
Verses 21-26: The Righteousness of God Revealed Through Faith. The chapter’s theological core reveals that righteousness comes apart from the law, through faith in Jesus Christ, who is the propitiation for sins, demonstrating God's justice and mercy.
Verses 27-31: Justification by Faith Excludes Boasting and Upholds the Law. Paul concludes by asserting that boasting is excluded because justification is by faith, not works, and that this faith upholds rather than nullifies the law.