@TRiG Yup, I am still struggling to find the rhyme / reason that I can accept, part of my investigation of the presuppositions of major Christian traditions. I'm very interested in how the Pharisaic tradition shaped Paul's understanding of old vs. new. To this end I find Chap 1 of
this book extremely useful and insightful. It's also a major research focus such as the "New Perspective on Paul" movement in the academia.