And the Raven, never flitting, still is sitting, still is sitting On the pallid bust of Pallas just above my chamber door; And his eyes have all the seeming of a demon’s that is dreaming, And the lamp-light o’er him streaming throws his shadow on the floor; And my soul from out that shadow that lies floating on the floor Shall be lifted4nevermore!
Poe, Edgar Allan. "The Raven." The Poetry Foundation, 1845



What is the significance of the Raven's shadow on the floor in the poem "The Raven" by Edgar Allan Poe?