The story of Er, a Pamphylian soldier who died in battle but several days later returned to life on his funeral pyre and reported what his soul had seen and heard in the world beyond, brings the Republic to a close in a visionary mode whose complexity tests the limits of understanding. For three (overlapping) reasons, the narrative raises more questions than it can answer: first, because it undertakes the profoundly ambitious task of presenting a symbolic perspective on the whole of reality, a figurative equivalent of Book 6's theme of “the contemplation of all time and all being” (486a); second, because its densely allusive texture yields a surplus of possible meanings that cannot be adequately encompassed by any single interpretation; and third, because it stands in a kind of challenging counterpoint, combining harmony and dissonance, with the rest of the Republic. Plato weaves into the account of Er's experience numerous strands from the materials of Greek philosophy, science, religion (not least, mystery religion), poetry, historiography, and even visual art. This fascinating multiplicity of sources and associations is not my primary concern here, though some pointers will be provided parenthetically as I proceed. I do, however, want to explore the character of the passage as an elaborate piece of philosophical writing, rather than as the vehicle for a set of putative authorial beliefs. While the myth’s overall significance as an ultimate (i.e., cosmic and eternal) vindication of justice looks clear enough at first sight, it leads us, I shall contend, into realms of irreducibly difficult interpretation.