Shelley in his "Ode to the West Wind" equates his poetry with the West Wind. As the wind is a transforming power in nature, so can his poetry be a transforming power intellectually and poetically.
The wind ushers in and creates the seasons, the West Wind in autumn, and its sister in the spring (part I). The winds bring new weather and climate.
In Part V, Shelley pleads with the West Wind to let him do the same, figuratively, with his poetry:
Make me thy lyre, even as the forest is [whistling is created as the wind passes through the forest]:
What if my leaves are falling like its own!
The tumult of thy mighty harmonies
Will take from both a deep, autumnal tone,
Sweet though in sadness. Be thou, Spirit fierce,
My spirit! Be thou me, impetuous one!
Drive my dead thought over the universe
Like withered leaves to quicken a new birth!
And, by the incantation of this verse,
Scatter, as from an unextinguished hearth
Ashes and sparks, my words among mankind!
Be through my lips to unawakened earth...
Shelley's vision is that his poetry will transform art, poetry, life, as the West Wind transforms nature.