Final answer:
Poe is trying to show the dark and unsettling atmosphere created by the presence of the raven.
Step-by-step explanation:
In the stanza provided, Poe is trying to show the dark and unsettling atmosphere created by the presence of the raven. The description of the raven's eyes as having the seeming of a demon's that is dreaming, and the lamp-light casting a shadow on the floor, contribute to the eerie and haunting tone of the poem "The Raven." The final line, "Shall be lifted-nevermore!" indicates that the speaker's soul will never be lifted from the shadow of the raven's presence.
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