The speaker wants to escape all the pressures and suffering that come with being human, drink and drugs seem to offer release.
Consciousness itself feels like a burden, it is exhausting and isolating.
The bird and the beauty of its song represent freedom from the limiting, isolating confines of the anxious human mind.
Speaker discusses a specific longing for alcohol, wanting a "draught of vintage" creating a link between alcohol and comfort.
Speaker longs for purity and beauty, this longing highlights on his focus on the bird's song.
Poem focuses on the speaker's personal awareness affected by the nightingale's singing.
Considers death as an alternative to intoxication.
People are alone, confined by the limits of their own minds. Dreaming allows some form of escape, suggesting brief glimpses of freedom.