Behaving as a Christ-Believer

The Pauline letter to the Ephesians and other texts of the early Christ-movement present behavior norms that vary considerably from one text to another. Many of these behavior norms were quite conventional in the first-century Mediterranean world and not unique to the Christ-movement. Nevertheless, the norms are typically presented as expressions of the identity as Christ-believers. Why? How was the relation between social identity and behavior norms constructed in the early Christ-movement? How did the Christ-believers in the early Christ-movement experience their identity in Christ as both causing and requiring certain behaviors?