“On the subject of the Incarnation, I believe that God the Verb, the only-begotten Son of the Father, who before all ages and ages was born, in the impassibility of the same God and Father, out of pity, in his love for mankind, for our fallen nature, of his own free will, by the will of God who has begotten him, and with the divine approval of the Spirit, without leaving the bosom of his Father, descended to our low estate.
According to the common will of the Father and the Spirit, and according to his nature and his infinite being, suffering no limits, ignoring our successive movements, acting by nature in a completely divine way, he entered Mary's womb, all shining with virginal purity - Mary the holy and radiant Virgin, full of divine wisdom, and exempt from all defilement of body, soul and spirit. He, the incorporeal, became incarnate.
He took on our form, he who, according to the divine essence, did not have a form, as far as the exterior and appearance were concerned; he took on a body like ours. He, the immaterial, became truly human, without ceasing to be recognized as God.”
Saint Sophronius (d. 639), Patriarch of Jerusalem