"Ode to a Nightingale"

Why does Keats bother with seeking out the bird to write his poem?
Keats wants to immerse himself in nature. He wants to feel all the things that the nightingale’s song makes him feel without interruption from any other thoughts of his.

How?
Keats’s poem seems to be all about the nightingale and how it’s song makes him feel. There are no apparent outside influences on this piece of poetry other than the nightingale. Keats achieves this by engrossing himself with the nightingale’s song and the feelings it creates. He pays no attention to the outside world in his poem because there is nothing mentioned about the things happening in his life that make him feel the way he does.

Keats uses rhetorical devices to make his poem flow smoothly and to give it a sad and beautiful tone. Alliteration is common in his poem such as “deep-delved”, “breezes blown”, “self-same song” and “still stream”. Assonance such as “beechen green” also achieves the same effect.