[45c] and they compressed the whole substance, and especially the center, of the eyes, so that they occluded all other fire that was coarser and allowed only this pure kind of fire to filter through. So whenever the stream of vision is surrounded by midday light, it flows out like unto like,1 and coalescing therewith it forms one kindred substance along the path of the eyes' vision, wheresoever the fire which streams from within collides with an obstructing object without. And this substance, having all become similar in its properties because of its similar nature,
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1 Vision is explained on the principle that “like is known by like”: a fire-stream issuing from the eye meets a fire-stream coming from the object of vision ( Cf. the view of Empedocles).
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