Read it through once

It will be observed that the words, “from out my heart,” involve the first metaphorical expression in the poem. They, with the answer, “Nevermore,” dispose the mind to seek a moral in all that has been previously narrated. The reader begins now to regard the Raven as emblematical—but it is not until the very last line of the very last stanza, that the intention of making him emblematical of Mournful and Never-ending Remembrance is permitted distinctly to be seen: