1.

 The holy Fathers assembled in Constantinople have decided not to set aside the faith of the three hundred and eighteen Fathers who met in Nicaea, Bithynia, but to let it remain sovereign, and that every heresy be anathematized, and especially and specifically that of the Eunomians, including that of the Eudoxians, and that of the Semi-Arians, including that of the Pneumatomachs, and that of the Sabellians, and that of the Marcellians, and that of the Photinians, and that of the Apollinarians.

(c. V of the 2nd; cc. I and V of the 6th; c. II of Car.)

Interpretation.

This first Canon of the present Council asserts that the 150 Holy Fathers who convened in Constantinople decided that the Orthodox faith, meaning the creed adopted by the 318 Fathers who had convened in Nicaea, Bithynia, should remain solid and inviolable, and that every heresy should be anathematized. In particular, the heresy of the Eunomians,[44] or of those called Eudoxians, the heresy of the Semi-Arians,[45] or of those known as Pneumatomach (i.e., spirit-fighters), the heresy of the followers of Sabellius,[46] the heresy of the adherents of Marcellus,[47] the heresy of the pupils of Photinus,[48] and the heresy of those of Apollinaris.[49]