"Ode to a Nightingale" is a poem by John Keats that explores themes of nature, beauty, and mortality. The speaker reflects on the enchanting song of a nightingale, which symbolizes the transcendent beauty of art and nature. This beauty contrasts sharply with human suffering and the inevitability of death. As the poem progresses, the speaker experiences a longing to escape reality and join the nightingale in its eternal song. However, he ultimately realizes that such an escape is impossible, leading to a poignant reflection on the fleeting nature of life and the enduring power of imagination.