Book excerpt: This book explores the construction of Christian identity in fourth and fifth centuries through inventing, fabricating and sharpening binary oppositions. Such oppositions, for example Christians - pagans; truth - falsehood; the one true god - the multitude of demons; the right religion - superstition, served to create and reinforce the Christian self-identity. The author examines how the Christian argumentation against pagans was intertwined with self-perception and self-affirmation. Discussing the relations and interaction between pagan and Christian cultures, this book aims at widening historical understanding of the cultural conflicts and the otherness in world history, thus contributing to the ongoing discussion about the historical and conceptual basis of cultural tolerance and intolerance. This book offers a valuable contribution to contemporary scholarly debate about Late Antique religious history and the relationship between Christianity and other religions.