The answer is: The narration suggests Ahab’s singular hatred of Moby D.ck.
In Herman Melville's "Moby D*ck," the narrator consistently mentions Captain Ahab's obsession with killing the whale. After losing his leg because of Moby D*ck, Ahab becomes mad, angry and self-destructive. Thus, his tormented thoughts make him desire to seek revenge and slaughter the animal.