"Who do you say that I am?" This question that Jesus asked of his disciples, so central to his mission, became equally central to the fledgling church. How would it respond to the Gnostics who answered by saying Jesus was less than fully human? How would it respond to the Arians who contended he was less than fully God? It was these challenges that ultimately provoked the Council of Nicaea in A.D. 325.

In this volume covering the first half of the article in the Nicene Creed on God the Son, John Anthony McGuckin shows how it countered these two errant poles by equally stressing Jesus' authentic humanity (that is, his fleshliness and real embodiment in space and time) and his spiritual glory or full divinity.