Christ is God, for he has given all things their being out of nothing. Yet he is born as one of us by taking to himself our nature, flesh-endowed with intelligent spirit. A star glitters by day in the East and leads the wise men to the place where the incarnate Word lies, to show that the Word, contained in the Law and the Prophets, surpasses in a mystical way knowledge derived from the senses, and to lead the Gentiles to the full light of knowledge.
For surely the word of the Law and the Prophets when it is understood with faith is like a star which leads those who are called by the power of grace in accordance with his decree to recognize the Word incarnate.
The great mystery of the divine incarnation remains a mystery for ever. How can the Word made flesh be essentially the same person that is wholly with the Father? How can he who is by nature God become by nature entirely human without lacking either nature, neither the divine by which he is God nor the human by which he became one of us? Faith alone grasps these mysteries.
—Maximus the Confessor, Five Hundred Chapters 1, 8-13