How can this come about?" Mary asked. "The Holy Spirit will come upon you," the angel answered, "and the power of the Most High will cover you with its shadow." And now you are the one who puts the question: "How can bread become Christ and wine His Blood?" I answer: "The power of the Holy Spirit will be at work to give us a marvel which surpasses understanding.
John of DamascusAn angel is an intelligent essence, always in motion. It has free will, is incorporeal, serves God, and has been bestowed with immortality. Only the Creator understands its true nature.
John of DamascusAngels are intelligent reflections of light, that original light which has no beginning. They can illuminate. They do not need tongues or ears, for they can communicate without speech, in thought.
John of DamascusBecause the one who by excellency of nature transcends all quantity and size and magnitude...has now...contracted himself into a quantity and size and has acquired a physical identity, do not hesitate any longer to draw pictures and to set forth, for all to see, him who has chosen to let himself be seen.
John of Damascus