Part I of this work determines where Paul is dependent on Jewish and Hellenistic exegesis of the Moses story where he provides a fresh interpretation. Part II brings form-critical studies of the Greek papyri to bear on the epistolary function of these verses. Part III investigates first-century homiletic patterns, exegetical techniques and material parallels in order to illuminate the sequence of Paul's thought. At issue in these verses is Paul's apostolic credibility. Paul selectively weaves together text, tradition and haggadah, using accepted methods of text interpretation and a common Jewish homiletical form, to provide his readers with reliable standards of apostolic accreditation and to defend himself against those who sought to discredit him as a failure in reaching his own people.