The importance of faith in Christianity cannot be denied, nor the arguments surrounding it. The crisis of faith that now grips the Western church necessitates a fresh look at its essential teachings. This study traces the trajectory of St. Paul's concept of faith in the rest of the New Testament in order to answer the question of how far and in what manner the other books of the New Testament agree or disagree with the Apostle of the Gentiles. Was St. Paul an outlier or an influencer? Common assumptions about faith and the language of faith are challenged in this study. Rather than giving simple voice to conventional presuppositions, this book wrestles with the origin and character of Christian faith and provides a provocative view that should spark renewed discussion about the heart of Christianity.