Accordingly, William Propp suggests that Moses’ proximity to Yahweh, a consuming fire (Deut 4:24), resulted in injurious side-effects and hideous disfigurement: “Presumably, this was some kind of light or heat burn . . . [perhaps] keratosis, a toughening of the layer of skin called keratin (Greek keras, ‘horn’) that can be caused by drastic overexposure to sunlight.”
