For we believe that the use of the
term Theotokos, if it is accompanied by Anthropotokos, is a sure sign of piety.
When we say [Christotokos, just as when we say] ‘Christ’, ‘Jesus’, ‘Son’, ‘only-begotten’,
and ‘Lord’, the expression signifies both. But to those who do not approve of
this term, we have offered the formula ‘Theotokos and Anthropotokos’, as
indicative of the two natures, Godhead and manhood, in order that it may escape
no one that we do not fall into the errors of either Mani or Paul [of
Samosata], but are protected against both. For he who says that what is consubstantial
with us was born from the Virgin, while being full of inseparable Godhead, proclaims
in its integrity the whole mystery of our Lord’s incarnation; but the rejection
of either of them abolishes the whole dispensation, and for those who deny it
[their disgrace] has recoiled on their own heads, and will soon do so all the
more. (Richard Price, The Council of Ephesus 431: Documents and Proceedings [Translated
Texts for Historians 72; Liverpool: Liverpool University Press, 2020, 2022], 427)
