2. An admission that the heaven and the stars are perpetual in their
individuality, while sublunary things are perpetual only in their form,
would demand demonstration that a corporeal being can preserve its
individuality as well as its form, even though the nature of bodies
were a continual fluctuation. Such is the nature that the physical
philosophers,[202] and even Plato himself, attribute not only to
sublunar bodies, but even to celestial ones. "For," asks (Plato[203]),
"how could corporeal and visible objects subsist ever immutable and
identical with themselves?" (Plato) therefore admits the opinion of
Heraclitus that "the sun itself is in a state of perpetual becoming
(or, growth)."[204]