The realization that one doesn't always need to comply with reasonable requests often comes with the wisdom of age. In the context of McEwan's "Enduring Love," the narrator reflects on personal growth and the importance of asserting one's own boundaries over time. This understanding emphasizes the distinction between societal expectations and individual needs.

As individuals age, they may recognize that saying no can be a form of self-assertion rather than a rejection of kindness. This perspective shift is liberating and allows for more authentic interactions, as it prioritizes personal well-being over the pressure to comply with others’ requests.