St. John Damascene ca. 676-749
The burning bush was an image of God’s Mother, and as Moses was about to approach it, God said: “Put off the shoes from thy feet, for the place whereon thou standest is holy ground.” (Ex. 3.5) Now if the spot on which Moses saw an image of Our Lady was holy, how much more the image itself? And not only is it holy, but I venture to say it is the holy of holies. (Apologia Against Those Who Decry Holy Images Bk II)