though polypus change his hue, yet the salamander keeps his colour
John Lyly. Euphues: The Anatomy of Wit (1578)
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I had always thought of our own individuality at a given moment in time as a polypus whose eye, an independent organism, although associated with it, winks at a scatter of dust without orders from the mind, still more, whose intestines are infected by an obscure parasite without the intelligence being aware of it,