"For Paul, the death and resurrection of Jesus show beyond a doubt that the defining narrative of the Christian story can no longer be the law that God gave to Moses on Mount Sinai. But without such a law, what becomes of ethics? Does the story of a holy and righteous people then crumble? These are the questions Paul sets out to answer in Romans 6-8. His answer is that a righteous life is now possible for the first time in human history because the power of sin is defeated through 'resurrection via crucifixion'."
-J.R. Daniel Kirk, Jesus Have I Loved, But Paul?, 87.