The next supposed proof of Cyril’s opposition to
the Nicene doctrine is that he has not adopted in his Lectures the
phrases “of the essence (οὐσίας) of the
Father,” and “of one essence (ὁμοούσιον) with
the Father.” This omission is the chief ground of the
reproaches cast upon the memory of Cyril by the writers of
Ecclesiastical History; for this he was described by Jerome as an
Arian, and by Rufinus as a waverer, while his formal acceptance of the
terms used at Nicæa is called by Socrates and Sozomen an act of
repentance. By others he was denounced as ᾽Αρειανόφρων
because he had addressed his letter to Constantius as “the most
religious king,” and never used the word ὁμοούσιον in his
Lectures.