So far, many works have been devoted to reconstructing the composition history of John's Gospel without paying attention to the literary unity thrust in the narratives of Peter and Judas who were probably two most influential figures of their time in radically opposite ways. This study serves to show how John would have understood them in his historical context, and thus affirms a well-known hermeneutic principle that a historical reconstruction must be born out from within the text rather than by imposing the interpreter's own frame of presuppositions. Recently, increasing number of scholars seem to be interested in dealing with the question of apostasy taught in the New Testament. However, few published works can be found with regard to the theme of apostasy embedded in the Johannine writings. The perennial debate between the Arminians and Calvinists over the question has been based on their respective systematic theological presupposition whether it emphasizes freedom of human will or God's predestination. J. Gundry Volf and B. J.
Oropeza have accomplished significant works of investigating Paul's teaching about apostasy and perseverance with the research methods of either topical-exegetical analysis (Gundry Volf) or socio-rhetorical-historical exegesis (Oropeza). This study of apostasy in the Johannine writings contributes to filling in the vacuum of scholarship regarding apostasy in the New Testament. In this study, a multidisciplinary approach has been taken - one that encompasses literary, historical, and theological exegesis. This method is taken from the frame of the diachronic analysis that interprets apostasy passages in John against the backdrop of the Synoptic parallels. John brings to light what the Synoptic accounts foreshadow with his literary art of interweaving the stories of Peter and Judas with the "deep structure" of apostasy. The comparison of Peter and Judas helps to discover that John's narratives fulfill a paraenetic function in the faith community that the believers should imitate Peter's perseverance. This study contributes not only to understanding the Johannine perception of apostasy but also illuminating on the historical situation of the Johannine community.