In Cormac McCarthy's "No Country for Old Men," the theme of the cost of promises is illustrated through a powerful quote that suggests people often pay a high price for assurances that may not hold true. The idea is that promises, unlike tangible goods, are inherently unreliable and come with hidden costs. This reflects a broader commentary on trust and the nature of human relationships, emphasizing that the expectation of a favor or reassurance rarely comes without complications.

The quote encapsulates the novel's exploration of morality and the consequences of choices. It suggests that while people might seek out bargains in their lives, emotional or moral commitments are fraught with risk. In a world where integrity and promise are tested, the burden of disillusionment can lead to greater harm than the initial cost of a deal. Ultimately, McCarthy questions the value we place on promises in a morally complex landscape.