The quote from Margaret Atwood's "Two-Headed Poems" reflects the profound influence of nature and life's challenges on a person's identity. The river symbolizes the continuous flow of experiences that shape an individual, much like how water polishes stones. The imagery of being battered against the shore indicates the struggles and obstacles one faces, which can be harsh and relentless.

Despite these trials, the phrase "she is still here" conveys resilience. It suggests that through the hardships and the shaping forces of life, one emerges stronger and continues to exist with a unique identity forged by both calm and storm. This idea illustrates the strength and endurance that define the human experience.