Library Eusebius of Caesarea On Ecclesiastical Theology
Book 2
Chapter 5: That in saying these things he denied the Son
And if Marcellus should say that it was the Word of God who was made flesh, yet he defined him as inseparable from God, granting an indivisible Monad and one hypostasis of God and of the Word in him, so that, according to him, the one who became man is to be thought of as none other than the God over all. But if there is an indivisible Monad, and God and the Word in him are one and the same, whom would anyone call Father, and whom Son, since the underlying subject (ὑποκείμενον) is one? Thus, then, Marcellus, bringing in one and the same Son-Father (υἱοπάτωρ), renewed Sabellius.
Greek: Erich Klostermann, Eusebius Werke IV (Leipzig: Hinrichs, 1906), pp. 60–182. Digital Greek via Open Greek and Latin / Interlinea (CC BY-SA 4.0). English: study translation by Claude Opus 5.5 for BWAB Library—not the copyrighted CUA Press (Spoerl/Vinzent 2017) text. Technical terms and contested passages may be revised.