The fact that the man continues to run suggests a symbolic representation of determination, resilience, and an unwavering pursuit of a goal or aspiration. Despite the narrator's assertion that his pursuit is futile, the man rejects this notion and defiantly continues to run towards the horizon. This symbolizes a refusal to accept limitations or discouragement, a willingness to challenge conventional wisdom, and a relentless drive to push forward and achieve something regardless of the odds. It highlights the power of perseverance and the refusal to be deterred by obstacles or naysayers.