He is constantly seeking the freedom that the nightingale sings about so elegantly. The bird's song of freedom symbolizes pure joy, showing that he is oblivious to the real world which Keats describes as "weariness, fever, and agitation" (line 23). Keats also wishes to free his soul from its problems by “imagining” the nightingale's world of beauty and eternity. Furthermore, he is in deep despair and wishes to vanish “among the leaves you have never known” to forget all his burdens (line 22). As the poem progresses, it explores many ways to join the nightingale. However, he realizes that he will inevitably have to face the reality that it is not possible to vanish with a nightingale: “Goodbye! imagination cannot cheat so well” (line 73). He admits that using his imagination to trick himself into the Nightingale's world isn't that effective. He is not sure if he has ever entered her world, which leads to multiple rhetorical questions that he asks himself: am I sleeping or am I awake? Am I back in the “real” world? Maybe the nightingale's world is reality and the “real” world is just a