84. Let us see, therefore, what the Council of Nicaea intended by saying o0moou/sion, that is, of one substance: not certainly to hatch the heresy which arises from an erroneous interpretation of o0moou/sion. I do not think the Council says that the Father and the Son divided and shared a previously existing substance to make it their own. It will not be adverse to religion to insert in our argument the creed which was then composed to preserve religion.

"We believe in one God the Father Almighty, Maker of all things visible and invisible:

"And in one our Lord Jesus Christ, the Son of God, born of the Father, Only-begotten, that is, of the substance of the Father, God of God, Light of Light, Very God of very God, born not made, of one substance with the Father (which in Greek they call o0moou/sion); By whom all things were made which are in heaven and in earth, Who for our salvation came down, And was incarnate, And was made man, And suffered, And rose again the third day, And ascended into heaven, And shall come to judge the quick and the dead.

"And in the Holy Ghost.

"But those who say, There was when He was not, And before He was born He was not, And that He was made of things that existed not, or of another substance and essence, saying that God was able to change and alter, to these the Catholic Church says anathema."

Here the Holy Council of religious men introduces no prior substance divided between two Persons, but the Son born of the substance of the Father. Do we, too, deny or confess anything else? And after other explanations of our common faith, it says, Born not made, of one substance with the Father (which in Greek they call o0moou/sion). What occasion is there here for an erroneous interpretation? The Son is declared to be born of the substance of the Father, not made: lest while the word born implies His divinity, the word made should imply He is a creature. For the same reason we have of one substance, not to teach that there is one solitary divine Person, but that the Son is born of the substance of God and subsists from no other source, nor in any diversity caused by a difference of substance. Surely again this is our faith, that He subsists from no other source, and He is not unlike the Father. Is not the meaning here of the word o0moou/sion) that the Son is produced of the Father's nature, the essence of the Son having no other origin, and that both, therefore, have one unvarying essence? As the Son's essence has no other origin, we may rightly believe that both are of one essence, since the Son could be born with no substance but that derived from the Father's nature which was its source.