The Fourth Gospel has been known as the "spiritual gospel" since the second century, but only recently have biblical scholars attempted to express the unique spirituality found in that sacred text. Surprisingly, no consensus has emerged even after a century of research. Thus, while John's Gospel is widely admired as a vibrant source of Christian piety, the distinct features of its spirituality remain unclear. Fr. Fiore addresses this problem from the fresh perspective of spiritual theology. Capitalizing on a century of Johannine biblical scholarship, he uses the interdisciplinary methods of spiritual theology to bring new data to the study of the Gospel and solutions to many lingering questions: How did ancient readers understand what scholars now refer to as the Gospel's spirituality? How does that ecclesial reading compare to the analysis of modern critical exegesis? What makes Johannine spirituality special among other forms of Christian piety? How does the question of the Gospel's authorship impact our understanding of its spirituality? Does the Gospel contain what we now call "mysticism"? In what ways is John's spirituality still relevant for Christians today? Students of Christian spirituality and Johannine exegesis alike will find here stimulating historical and theological analysis of the Gospel's spirituality.