Here's the stanza with some explanation:
```
"Be thou, Spirit fierce,
My spirit! Be thou me, impetuous one!
Drive my dead thoughts 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
The trumpet of a prophecy! O Wind,
If Winter comes, can Spring be far behind?"
```
- The speaker addresses the West Wind as a "Spirit fierce," calling it to become his spirit, and desires to merge with its impetuous nature.
- He yearns for his lifeless thoughts (represented as the "dead thoughts") to be scattered across the universe; like old leaves, to encourage the birth of new ideas.
- Through the poetic incantation of this verse, his spoken words would be scattered (like ashes and sparks) among people (mankind), potentially igniting intellectual growth and enlightenment.
- He visualizes himself being an agent of positive change through powerful, inspired spoken words that will reach even the "unawakened earth."
- The Wind would serve as a metaphor for his transformation by acting as the trumpet sounding a prophetic message.
- Ultimately, the stanza explores themes of the wind's destructive force, rebirth, and the speaker's longing to effect substantial change and awaken human potential.