Brann, Eva, "The Music of the Republic," The Music of the Republic: Essays on Socrates' Conversations and Plato's Writings, Philadelphia: Paul Dry Books, 2004, 108-245.

Excerpt:

Survey of Arguments

I. Mythos

A. The Republic is composed of concentric rings encompassing a center. [116]
B. The outer ring represents Socrates’ descent into the house of Pluto-Cephalus (Books I and IX-X). [116]

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