On the Councils, or the Faith of the Easterns

¹⁹ The heretics when beset by authoritative passages in Scripture are wont only to grant that the Son is like the Father in might while they deprive Him of similarity of nature. This is foolish and impious, for they do not understand that similar might can only be the result of a similar nature. For a lower nature can never attain to the might of a higher and more powerful nature. What will the men who make these assertions say about the omnipotence of God the Father, if the might of a lower nature is made equal to His own? For they cannot deny that the Son's power is the same, seeing that He has said What things soever the Father does, these also does the Son likewise.

No, a similarity of nature follows on a similarity of might when He says, As the Father has life in Himself, so also has He given to the Son to have life in Himself. In life is implied nature and essence; this, Christ teaches, has been given Him to have as the Father has. Therefore similarity of life contains similarity of might: for there cannot be similarity of life where the nature is dissimilar. So it is necessary that similarity of essence follows on similarity of might: for as what the Father does, the Son does also, so the life that the Father has He has given to the Son to have likewise. Therefore we condemn the rash and impious statements of those who confess a similarity of might but have dared to preach a dissimilarity of nature, since it is the chief ground of our hope to confess that in the Father and the Son there is an identical divine substance.

VII. “And if any one professing that he believes that there is a Father and a Son, says that the Father is Father of an essence unlike Himself but of similar activity; for speaking profane and novel words against the essence of the Son and nullifying His true divine Sonship, let him be anathema.”

20. By confused and involved expressions the heretics very frequently elude the truth and secure the ears of the unwary by the mere sound of common words, such as the titles Father and Son, which they do not truthfully utter to express a natural and genuine community of essence: for they are aware that God is called the Father of all creation, and remember that all the saints are named sons of God. In like manner they declare that the relationship between the Father and the Son resembles that between the Father and the universe, so that the names Father and Son are rather titular than real. For the names are titular if the Persons have a distinct nature of a different essence, since no reality can be attached to the name of father unless it be based on the nature of his offspring. So the Father cannot be called Father of an alien substance unlike His own, for a perfect birth manifests no diversity between itself and the original substance. Therefore we repudiate all the impious assertions that the Father is Father of a Son begotten of Himself and yet not of His own nature. We shall not call God Father for having a creature like Him in might and activity, but for begetting a nature of an essence not unlike or alien to Himself: for a natural birth does not admit of any dissimilarity with the Father's nature. Therefore those are anathema who assert that the Father is Father of a nature unlike Himself, so that something other than God is born of God, and who suppose that the essence of the Father degenerated in begetting the Son. For so far as in them lies they destroy the very birthless and changeless essence of the Father by daring to attribute to Him in the birth of His Only-begotten an alteration and degeneration of His natural essence.

VIII. “And if any one understanding that the Son is like in essence to Him whose Son He is admitted to be, says that the Son is the same as the Father, or part of the Father, or that it is through an emanation or any such passion as is necessary for the procreation of corporeal children that the incorporeal Son draws His life from the incorporeal Father: let him be anathema.”

21. We have always to beware of the vices of particular perversions, and countenance no opportunity for delusion. For many heretics say that the Son is like the Father in divinity in order to support the theory that in virtue of this similarity the Son is the same Person as the Father: for this undivided similarity appears to countenance a belief in a single monad. For what does not differ in kind seems to retain identity of nature.

22. But birth does not countenance this vain imagination; for such identity without differentiation excludes birth. For what is born has a father who caused its birth. Nor because the divinity of Him who is being born is inseparable from that of Him who begets, are the Begetter and the Begotten the same Person; while on the other hand He who is born and He who begets cannot be unlike. He is therefore anathema who shall proclaim a similarity of nature in the Father and the Son in order to abolish the personal meaning of the word Son: for while through mutual likeness one differs in no respect from the other, yet this very likeness, which does not admit of bare union, confesses both the Father and the Son because the Son is the changeless likeness of the Father. For the Son is not part of the Father so that He who is born and He who begets can be called one Person. Nor is He an emanation so that by a continual flow of a corporeal uninterrupted stream the flow is itself kept in its source, the source being identical with the flow in virtue of the successive and unbroken continuity. But the birth is perfect, and remains alike in nature; not taking its beginning materially from a corporeal conception and bearing, but as an incorporeal Son drawing His existence from an incorporeal Father according to the likeness which belongs to an identical nature.

IX. “And if any one, because the Father is never admitted to be the Son and the Son is never admitted to be the Father, when he says that the Son is other than the Father (because the Father is one Person and the Son another, inasmuch as it is said, There is another that bears witness of Me, even the father who sent Me), does in anxiety for the distinct personal qualities of the Father and the Son which in the Church must be piously understood to exist, fear that the Son and the Father may sometimes be admitted to be the same Person, and therefore denies that the Son is like in essence to the Father: let him be anathema.”