John Piper comments in the introductory message in his series on Romans: So, verse one may look like it is about the author of the letter; but behind every phrase is Someone far greater. God bought him by the death of his Son, God called him to be an apostle (Galatians 1:15; 1 Corinthians 1:1), … More Piper on Romans: So God is at the bottom and God is at the top and God is in the middle.