Romans:
One of the benefits of studying slowly is getting to look at every word and understanding all the implications. In Romans 1, we see that the Gospel was promised beforehand by the prophets.. One theologian rightly noted that Romans is an exposition of the Old Testament's Gospel. Luther thought Romans was a great demonstration of the entirety of the Gospel and set forth the proper way to understand the Old Testament. Paul is not writing a caveat to the Old but relied solely upon the Old for His exposition.