This is a question I struggle with. Eric was leveled with the charge of iconoclasm for questioning the authority of Paul on the issue of sexuality. So I ask: Where does Paul’s authority lie? Does he fill in where Jesus didn’t explain things? Does he add to Jesus things that maybe weren’t meant to be added? Do either questions matter? Does he have final authority on sin and Christian practice? If not final authority, then where is his place in the “overall trajectory of scripture”?
Let’s venture out here a little bit. If you are arguing in the tradition of Paul as authoritative, don’t assume that this is self-evident. Prove it. If you are arguing that Paul’s authority is questionable, same applies: prove it.