What is the theme of poem The Lake Isle Of Innisfree?

The theme of the poem "The Lake Isle of Innisfree" by William Butler Yeats is the longing for a simple, peaceful life in nature, away from the hustle and bustle of the city. The speaker imagines an idyllic existence on a small island in the middle of a lake, where he can escape the noise and stress of modern life and connect with the natural world. He describes the island as a place of peace and tranquility, where he can be free to live a simple life and enjoy the beauty of nature. The poem expresses the speaker's deep desire to escape from the constraints of city life and find solace and happiness in a more natural setting.