The quote reflects a character's composed demeanor despite the demanding nature of his tasks. It emphasizes how, on the surface, he appears unaffected by the hard work he has done. The light sweat indicates effort but is overshadowed by his calm appearance, suggesting a resilience or an ability to manage challenges effectively.
This portrayal serves to highlight a theme of endurance found in Cormac McCarthy's "No Country for Old Men." The character’s outward calm might conceal deeper struggles or reflections on the weight of his experiences, inviting readers to consider the complexities of human resilience in the face of adversity.