And I Am the arrow,
The dew that flies Suicidal, at one with the drive Into the red
Eye, the cauldron of morning. (26-31)
In this final, crazy moment of the poem, the speaker imagines that she and Ariel have become one. Her horse's drive is her drive, and they ride off as one into the sunset, sharp as an arrow. The "suicide" is the death of her former, human-bound self. The speaker is now a horse-woman. Awesome sauce.