Paul's masterwork — the gospel argued, step by step, from guilt to glory.
"And we know that all things work together for ______ to them that love God, to them who are the called according to his purpose."
Augustine was converted reading Romans 13; Luther, wrestling with Romans 1; Wesley, hearing Luther's preface to Romans read aloud. This letter has a track record.
Paul wrote Romans to a church he had never visited — which is why it reads less like a letter and more like the gospel laid out in full, brick by brick.
The 'Romans Road' — 3:23, 6:23, 5:8, 10:9 — has walked more people through the gospel than perhaps any other set of verses in Scripture.
Romans 8 opens with 'no condemnation' and closes with 'no separation' — many believers call it the greatest chapter in the Bible.