In chapter 44, Melville highlights the negative effects obsessing over the past has on a person’s mental health by Ishmael’s narration of how Ahab’s obsession over the whale is causing him to spiral more into madness. Ishmael says, “God help thee, old man, thy thoughts have created a creature in thee; and he whose intense thinking thus makes him a Prometheus; a vulture feeds upon that heart for ever; that vulture the very creature he creates” (Melville 220). Here, Ishmael is observing the fact that Ahab’s obsession of killing the whale is consuming him from within. Ahab is a monster in the making right in front of everyone’s eyes. This suggests that Ahab’s fixation on revenge has shaped his inner self, how his thoughts became the very reason for his suffering. Melville here is showing how when the mind is trapped in an endless cycle of vengeance, it becomes a saboteur of the individual.
Prometheus is from Greek Mythology and his story was he defied the gods and his punishment (which is what’s mentioned) is he was chained to a rock where a bird would eat his liver which would then regenerate overnight, only for the same thing to keep happening. And with the comparison to Prometheus, Melville shows how Ahab’s obsessive thoughts are becoming his own punishment, one that feeds at him endlessly. Ahab’s torment is self created and it is causing him to spiral more into insanity. When one cannot let go of the past, it can become their own destroyer. As seen with Ahab, his obsessive thoughts are ruining his mental state and physical state. His bad state is so noticeable that his crewmates, like Ishmael, are able to point it out. Also seen in earlier chapters, other crewmates also point out Ahab’s madness. This shows how people are able to recognize the negatives of obsessing over the past and how it leads to self destruction