God put forth Christ to display his righteousness. This statement is all about God -- not us. Wow! God was actually justifying himself. . . at the same time he was justifying me!
The heart of the gospel is here. God put forth Jesus as the one who satisfies his wrath so that I might be made right. I can be justified and God can be just at the same time because he exercises his wrath on and has it satisfied in Christ. His holiness is not compromised. Beautiful!
The Christian's relationship with the law is brought up and addressed at length. Apart from the law someone is justified, but the law witnesses to the justice of God (Romans 3:21). Apart from works of the law God justifies both Jew and Gentile (Romans 3:29-30). Grace levels the playing field so God cannot be accused of favoritism.