In Haruki Murakami's "Kafka on the Shore," the author explores the fluidity of fundamental concepts such as time, love, and life. He presents the idea that these elements are not fixed; instead, they constantly change and evolve, similar to the ever-shifting nature of the universe. This perspective suggests that our understanding of reality is dynamic, inviting reflection on how we perceive and interact with the world around us.

The metaphor of the universe as a "big FedEx box" further emphasizes this theme. It implies that experiences and ideas are constantly in transit, moving from one state to another. Just as packages are delivered and received, so too are our perceptions and realities transformed over time. This continuous flux leads to a deeper understanding of existence, encouraging a more open and adaptable mindset toward the complexities of life.