The quote highlights the resilience and perseverance of those considered the "good guys." It emphasizes their commitment to continue striving for what is right, despite challenges and obstacles. This determination to keep trying is a defining trait of their character.
In the context of Cormac McCarthy's "The Road," this sentiment reflects the broader themes of hope and survival. The characters face dire circumstances but embody a spirit of persistence, suggesting that the strength to endure is an integral aspect of humanity, even in the bleakest situations.