By Water & Blood

Chapter 5: How Marcellus denied the Son of God, imitating Sabellius’s heresy

But when Sabellius said these things, the Church of God drove him far away, as one who dared godless and impious things. Yet these very things Marcellus attempts to renew, using as a cloak an unconvincing argument. For while rightly defining God as one, he says that this same God has in himself a Word united and conjoined with him; and then he calls one part of the one God Father and the other Son, as though there were in him a kind of double and composite essence (οὐσία).

And how much better than he—if one must choose among evils—is the one who does not divide the unoriginate, unbegotten, and divine power, but confesses in bare words that it is the same! And how much better than both is the Jew, who neither divides the one God into Father and Son as Marcellus does, nor introduces the same one as Son-Father after the manner of Sabellius, but worships God and recognizes and awaits his Christ, who was proclaimed through the prophets as about to come. Yet since, when he came, they did not receive him, they have paid, and will pay, the penalty for their unbelief toward him.