“What sayest thou? Didst thou not promise to discourse of the Only-begotten Son of God, and dost thou make mention of David, a man born after a thousand generations, and say that he is both father and ancestor?” Stay, seek not to learn all at once, but gently and by little and little. Why, it is in the vestibule that thou art standing, by the very porch; why then dost thou hasten towards the inner shrine? As yet thou hast not well marked all without. For neither for a while do I declare unto thee that other generation: or rather not even this which cometh after, for it is unutterable, and unspeakable. And before me the Prophet Esaias hath told thee this; wherewhen proclaiming His passion, and His great care for the world, and admiring who He was, and what He became, and whither He descended, he cried out loud and clear, saying thus, “Who shall declare His generation?”