Abstract: This book presents a detailed study of the theological concept (divine mediation) that was central to the Christological controversy of the early 4th century. The subject of this study is the access to God provided through the divine Word, as seen in the theologies of Eusebius of Caesarea, Marcellus of Ancyra, and Athanasius of Alexandria during the early years of the ‘Arian’ controversy. By analysing the views of three participants at the Council of Nicaea (325), this book demonstrates the variety of perspectives in a way that questions popular approaches to the period that see the controversy as having only two sides. This analysis constitutes a new approach to the early Arian controversy, as well as showing the theological backdrop of Athanasius' insight on Christ as mediator. It further demonstrates the contemporary relevance of the issue by giving an Athanasian critique of the modern Christology of Roger Haight.

Keywords: divine mediation, God, divine Word, Eusebius of Caesarea, Marcellus of Ancyra, Athanasius of Alexandria, Council of Nicaea, Arian controversy