Gregory of Nyssa makes no reference to icons/statues/etc. but instead provides a very Reformed view of how the Divine Beauty is illustrated for us:
"It is true, indeed, that the Divine beauty is not adorned with any shape or endowment of form, by any beauty of colour, but is contemplated as excellence in unspeakable bliss. As then painters transfer human forms to their pictures by the means of certain colours, laying on their copy the proper and corresponding tints, so that the beauty of the original may be accurately transferred to the likeness, so I would have you understand that our Maker also, painting the portrait to resemble His own beauty, by the addition of virtues, as it were with colours, shows in us His own sovereignty: and manifold and varied are the tints, so to say, by which His true form is portrayed: not red, or white, or the blending of these, whatever it may be called, nor a touch of black that paints the eyebrow and the eye, and shades, by some combination, the depressions in the figure, and all such arts which the hands of painters contrive, but instead of these, purity, freedom from passion, blessedness, alienation from all evil, and all those attributes of the like kind which help to form in men the likeness of God: with such hues as these did the Maker of His own image mark our nature."
- Gregory of Nyssa, On the Making of Man, Chapter V, Section 1