e versus essence. In this connection, Pegis comments:
There are not many philosophical aberrations that were
either inherited or developed by the thinkers of the
thirteenth century that St. Thomas does not trace to
the Platonic metaphysics, psychology and epistemology.
Whether the problem be the nature of God and the divine
goodness, the procession of creatures from God, their
constitution and unity, their causality and autonomy
under the creative causality of God, the unity and
economy of man's composite beingthe ultimate issue
for St. Thomas is Platonism because it is for him the
ultimate source to which the many and seemingly varied
positions of later thinkers were reducible. Nor are the
Platonic errors in these different domains
fundamentally many. They are basically one error . . .
in St. Thomas' estimation, errors of existence. If
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