Achilles, His Armor, His Psyche

Someone recently asked, what was it that sent me after Achilles, led me to the Hare book, and restructured his entire existence to finally - after three thousand years of poets and writers not getting it - explain him correctly? It was an encounter of the kind that only a writer can understand.

There I was, merrily banging away at a final outline for Ajax, when he suddenly woke up and said to me, "Your whole theme is the brotherhood of arms, isn't it?" 
"Yes, so?"

"Achilles died when he went secretly to Priam to make private peace."

"Yes, so?"

"By going there, Achilles violated the brotherhood pact, right?"

"I hadn't thought that far but okay, yes, so?"

"Everyone believes that I died because my brothers in arms violated the brotherhood pact by allowing Agamemnon to give Achilles' armor, which I thought I was entitled to, to Odysseus, right?"

"Yes, so?"

"But Achilles walked into our enemy's house to betray us all, right?"

"Yes, so?"

“So," he said, with his own ponderous patience, "Why would I even want it?"

"Oh shit."