Some major themes of "The Raven" are the dark side of the human mind, life going on after a loss, and never forgetting or moving on. The dark side of the human mind is often present in Poe's works. The narrator dwells on Lenore's death, leaving him depressed. He starts to imagine the raven coming to him, a sign of his being crazy. He is trying to move on after his loss, but he cannot. He is unable to forget Lenore. Life is going on, but his memories will be there forever as evidenced by the last stanza when he realizes that the raven will never leave because it represents his mourning.
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