In Moby-Dick, Melville employs stylized language, symbolism, and the metaphor to explore numerous complex themes. Through the journey of the main characters, the concepts of class and social status, good and evil, and the existence of God are all examined, as the main characters speculate upon their personal beliefs and their places in the universe. The narrator's reflections, along with his descriptions of a sailor's life aboard a whaling ship, are woven into the narrative along with Shakespearean literary devices, such as stage directions, extended soliloquies, and asides. The book portrays destructive obsession and monomania, as well as the assumption of anthropomorphism—projecting human instincts, characteristics and motivations onto animals. Moby Dick is ruthless in attacking the sailors who attempt to hunt and kill him, but it is Ahab who invests Moby Dick's natural instincts with malignant and evil intentions. In fact, it is not the whale but the crippled Ahab who alone possesses this characteristic..