God, as it were, addresses each of us, as he enters, with his
"Know Thyself", which is at least as good as "Hail".
We answer the God back with "EI" (Thou Art), rendering
to him the designation which is true and has no lie in it, and
alone belongs to him, and to no other, that of Being... The
opposite principle which we find in the universe, whatever its
origin, is that which binds beings together and prevails over
the corporeal weakness tending to destruction.
my thinking the word "EI" is confronted with this
false view, and testifies to the God that Thou Art, meaning
that no shift or change has place in him, but that such things
belong to some other God, or rather to some Spirit set over
Nature in its perishing and becoming, whether to effect either
process or to undergo it. This appears from the names, in themselves
opposite and contradictory. He is called Apollo, another is
called Pluto; he is Delius (apparent), the other Aidoneus (invisible);
he is Phoebus (bright), the other Skotios (full of darkness);
by his side are the Muses, and Memory, with the other are Oblivion
and Silence; he is Theorius and Phanæus, the other is
"King of dim Night and ineffectual Sleep."
Essays of Plutarch" (translater: A.O. Prickard, 1918)