Another point worth mentioning I think is that our doctrine of the Theotokos, while not making her a fourth person of the "Trinity," comes close, by presenting her as the closest thing to a deified person who has ever lived.
To which I replied:
You must mean "deified" as "becoming like God" and not as "divine," and you must mean "person" as "human being." The Father, Son, and Holy Spirit are all divine persons, and Jesus Christ is the closest thing to a divine human being who has ever lived.
This brought the following objections:
It seems to suggest that Jesus Christ was an individual human being. He was not a human being in that He did not assume a human person.
You have said that Christ was a human person and a human being. This is heresy. Christ assumed human nature. He was not a human person/being/anthropos: He could not be a human person and a divine person. That makes two persons.
Our Lord Jesus Christ is correctly referred to as "theanthropos" (God-human)
I contend that these objections confuse "being" with "person" and that Christ was and is a human being — a man, an anthropos — in addition to being God, inasmuch as He was and is a divine Person sharing the human nature "in a single body," as St. Athanasius says.
It seems to me quite plain that you can't be human and not be a human being. Let me say that again: YOU CAN'T BE HUMAN AND NOT BE A HUMAN BEING. Ergo, if Christ was not a human being, if He was not an anthropos, then He was not human.
To say that Christ was not a human being and not an anthropos, but rather a peculiar kind of being that may only be called theanthropos or "God-man," smacks of monophysitism.