We hold then that the divine subsistence of God the Word
existed before all else and is without time and eternal, simple and
uncompound, uncreated, incorporeal, invisible, intangible,
uncircumscribed, possessing all the Father possesses, since He is of
the same essence with Him, differing from the Father’s
subsistence in the manner of His generation and the relation of the
Father’s subsistence, being perfect also and at no time separated
from the Father’s subsistence: and in these last days,
without leaving the Father’s bosom, took up His abode in an
uncircumscribed manner in the womb of the holy Virgin, without the
instrumentality of seed, and in an incomprehensible manner known only
to Himself, and causing the flesh derived from the holy Virgin to
subsist in the very subsistence that was before all the ages.