Please comment upon these lines from "Ode to a Nightingale" by Keats.Forlorn! the very word is like a bell To toll me back from thee to my sole...

The lines you have quoted come from the first half of the
last stanza of this famous Romantic poem, in which the speaker has a kind of out-of-body
experience and reflects and meditates upon the human condition thanks to the song of the
nightingale that he listens to. As the song of the nightingale ends, so the poet is
brought back to earth, and this is what occurs at the beginning of this
quote.

Note the use of the word "Forlorn." This is of
course a word that is used in the previous line of hte poem, and the repetition
underlines the speaker's mood and echoes the sound of the tolling bells that he compares
it to, which calls the speaker back from his reverie to harsh reality. Although, in the
middle of the poem, the "fancy" or imagination that is spoken of here is shown to
operate in full power, transporting the speaker away from the trials and tribulations of
life on earth, at the same time, the power of fancy and its limitations are indicated
here, as the speaker refers to her as a "deceiving elf." The tone is one of reflective
resignation as the speaker bids farewell to the "plaintive anthem" of the nightingale
and is forced to rejoin reality.