"Each kind of living thing, Asclepius, no matter whether mortal or immortal, rational (or irrational), whether ensouled or soulless, every one has the appearance of its kind in keeping with its relation to the kind, and although each kind of living thing possesses the whole form of its kind, within that same form each of them differs from the other. For example, although mankind is one in form, so that a human can be distinguished on-sight, each person within the same form differs from the others. For the class is divine and incorporeal, as is anything apprehended by the mind."

-- Asclepius