The Last Unicorn by Peter S. Beagle explores themes of mortality and decay through the protagonist's journey. The quote "This body is dying. I can feel it rotting all around me" encapsulates the internal struggle of the characters as they confront the inevitable decline of life. This powerful imagery reflects not just a physical state but also the emotional weight of losing one's essence and identity in a world filled with fleeting beauty.

The narrative unfolds with a sense of urgency and despair, as the unicorn grapples with her fading existence amidst a changing landscape. As she ventures into the unknown, the realities of life and death become intertwined, prompting both her and the reader to reflect on the transient nature of existence. Beagle's poignant writing invites a deeper understanding of life’s fragility and the inevitable passage of time.