In the poem "Ode to the West Wind," Shelley expresses admiration for nature, and in particular for wind. He tells us that he sees wind as both a destroyer and a creator, and that seeing how the wind signals the coming of winter, he believes spring cannot be far behind.
However, this poem can also be seen as a reference to his poetic abilities. The autumn and winter are a period of less inspiration and admiration for poems. However, Shelley hopes that the wind is inspiration, and that this wind brings a new spring, or a new birth for poetical beauty.