In "The Death of Hector," the theme of how rage can blind one's decisions is vividly portrayed through the characterization of Achilles. His unbridled anger consumes him, distorting his judgment and leading to tragic consequences.
When Hector kills Achilles' close friend Patroclus, Achilles is overcome by rage, demonstrated by his vow to take revenge at any cost. This overwhelming fury blinds him to reason, as seen in his merciless pursuit of Hector.
So, Homer tells more on this theme, stating, by the statement "Blinding rage—Hector killed my comrade, / h/ack/ed down Patroclus—/ that is the killer I killed" (Book 22). Achilles' unchecked rage ultimately drives him to make choices with severe and irreversible consequences.