Josef Pieper, Enthusiasm & Divine Madness:
The fact is that there is no such thing as a Platonic system. Those who truly know Plato have time and again had to admit this. … the absence of a coherent system is not a sign of internal contradictions in Plato’s mind, but—as is the case with other great thinkers, such as Aristotle, Augustine, and Thomas Aquinas—a mark of tacit respect for the unfathomability of the universe.
Etymologies 