In Nick Hornby's book "How to Be Good," the narrator expresses a strong belief in rationality, stating that he does not subscribe to the idea of miraculous transformations in a person's character. Instead, he advocates for the notion that significant change, particularly in a person's emotions, should be a gradual process achieved through consistent therapy over time.

This perspective highlights the author's skepticism towards quick fixes or unrealistic expectations regarding personal development. The narrator's longing for David's anger to dissipate gradually emphasizes a desire for authentic change rooted in hard work rather than sudden, superficial resolutions.