This book offers a fresh interpretation of the relation between Greek thought and ancient Christian theology through an analysis of three foundational and controversial thinkers: Origen, Eusebius of Caesarea, and Athanasius. As an urban teacher, civic apologist, and ascetic bishop, each of the three theologians offered a distinctive Christian response to the religious and ecclesiastical issues of the third and fourth centuries. Each cosmology and Christology therefore reveals particular concerns about individual and social identity and salvation in the developing Christian community.