For like as a vessel that a man uses is nothing worth when it is broken; even so it is with their gods: when they be set up in the temple, their eyes be full of dust through the feet of them that come in.
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Olympiodorus of Alexandria
He speaks of idols but says the same of the leaders of the heretics and of those who are preoccupied with earthly things. Their eyes are full of the devil’s dust, so they truly cannot see the diabolical impulses that enter them. - "Fragments on the Letter of Jeremiah 16"