The concern of the book is whether Hilary of Poitiers compromised the Nicene faith, a charge suggested even in Hilary's own day, when he attempted to bring together the homouseans and the homoeouseans. The author revisits the arguments offered by recent studies on the issue and analyzes the primary sources to assert confidently that Hilary did not compromise the Nicene confession. The book demonstrates that the confession of faith of the homoeousean group with whom Hilary conciliated was not another form of Arianism. Similarly, the author clarifies that the distinction between the numeric unity and specific unity on which modern authors unsympathetic to Hilary base their