1. 'But the Raven, sitting lonely on the placid bust, spoke only
That one word, as if his soul in that one word he did outpour.' (It seems to Poe that the bird speaks with human emotion as if it is indeed trying to communicate with him, and answer the questions arising in his mind)
2. 'In there stepped a stately Raven of the saintly days of yore;
Not the least obeisance made he; not a minute stopped or stayed he;
But, with mien of lord or lady, perched above my chamber door...' (Poe considers the raven's demeanor to be unyielding, somewhat like how a king would behave in front of his subjects, or how a man of higher social rank would behave in front of those of lesser rank)
3. 'And the silken, sad, uncertain rustling of each purple curtain...' (Uncertainty is a quality attributed to humans)
4. 'And each separate dying ember wrought its ghost upon the floor.' (Ghosts are usually used in reference to humans beings, but here, Poe has assigned this reference to the burning embers from his fire)
I hope this helped you out!