The setback does more than make the narrator suffer: it breaks the explanation that justified his commitment. Revisiting the earlier success prevents the story from simply replacing one profitable anecdote with another without acknowledging what he had believed.
The sequence separates acquiring useful information from making an overconfident inference from it. The revision has an observable consequence: the same cable field remains, but the narrator changes the question he asks of it.
The ending gives the discipline argument a visible action under deliberately arranged information and timing conditions. Its last image recalls the protected routine established at the start of the chapter, so the financial milestone is followed by a concrete enactment of the narrator’s principle.
Reviewed examples have a source-linked editorial interpretation. Detected candidates are exact passages or structures retrieved by an explicit rule and still need interpretation. Neither label establishes a cause of bestseller longevity. No missing text is counted as a negative example.