121.
Secondly, to this 'homo-ousiotes' the Fathers added a numerical unity of the divine essence.

This Petavius has proved at large by numerous testimonies, even from those very Fathers, whom he before accused for making God only collectively one, as three men are one man; such as Gregory Nyssen, St.Cyril, Maximus, Damascen; which is a demonstration, that however 'he might mistake' their explication of it, from the unity of human nature, they were far enough from Tritheism, or one collective God.
This is most uncandid.

Sherlock, even to be consistent with his own confession, Sec.1.p.120, ought to have said, "However he might mistake their 'intention', in consequence of their inconvenient and unphilosophical explication;" which mistake, in fact, consisted in taking them at their word.
Ib.
Petavius greatly commends Boethius's explication of this mystery, which is the very same he had before condemned in Gregory Nyssen, and those other Fathers .-- That Father, Son, and Holy Ghost are one God, not three Gods: 'hujus conjunctionis ratio est indifferentia': that is, such a sameness of nature as admits of no difference or variety, or an exact 'homo-ousiotes', as he explains it.

* * Those make a difference, who augment and diminish, as the Arians do; who distinguish the Trinity into different natures, as well as Persons, of different worth and excellency, and thus divide and multiply the Trinity into a plurality of Gods.

'Principium enim pluralitatis alteritas est.