Billy feels a sense of endless journeying, as if every step he takes leads him to yet another beginning rather than an endpoint. This reflects a deep philosophical notion about life and its continuous nature. No matter how much progress one makes, there always seems to be something more beyond the horizon.

This idea encapsulates the essence of searching for meaning and resolution. In McCammon's "Mystery Walk," this feeling of perpetual exploration serves as a metaphor for life's challenges and mysteries that remain unsolved, emphasizing that the journey itself may hold more significance than any final destination.