Tomus ad Antiochenos

⁵ The creed of Sardica not an authorised formula. Question of 'hypostasis.'

And prohibit even the reading or publication of the paper, much talked of by some, as having been drawn up concerning the Faith at the synod of Sardica. For the synod made no definition of the kind. For whereas some demanded, on the ground that the Nicene synod was defective, the drafting of a creed, and in their haste even attempted it, the holy synod assembled in Sardica was indignant, and decreed that no statement of faith should be drafted, but that they should be content with the Faith confessed by the fathers at Nicæa, inasmuch as it lacked nothing but was full of piety, and that it was undesirable for a second creed to be promulged, lest that drafted at Nicæa should be deemed imperfect, and a pretext be given to those who were often wishing to draft and define a creed. So that if a man propound the above or any other paper, stop them, and persuade them rather to keep the peace. For in such men we perceive no motive save only contentiousness. For as to those whom some were blaming for speaking of three Subsistences, on the ground that the phrase is unscriptural and therefore suspicious, we thought it right indeed to require nothing beyond the confession of Nicæa, but on account of the contention we made enquiry of them, whether they meant, like the Arian madmen, subsistences foreign and strange, and alien in essence from one another, and that each Subsistence was divided apart by itself, as is the case with creatures in general and in particular with those begotten of men, or like different substances, such as gold, silver, or brass—or whether, like other heretics, they meant three Beginnings and three Gods, by speaking of three Subsistences.

They assured us in reply that they neither meant this nor had ever held it. But upon our asking them 'what then do you mean by it, or why do you use such expressions?' they replied, Because they believed in a Holy Trinity, not a trinity in name only, but existing and subsisting in truth, 'both a Father truly existing and subsisting, and a Son truly substantial and subsisting, and a Holy Spirit subsisting and really existing do we acknowledge,' and that neither had they said there were three Gods or three beginnings, nor would they at all tolerate such as said or held so, but that they acknowledged a Holy Trinity but One Godhead, and one Beginning, and that the Son is coessential with the Father, as the fathers said; while the Holy Spirit is not a creature, nor external, but proper to and inseparable from the Essence of the Father and the Son.