In the novel "Twenties Girl" by Sophie Kinsella, a central theme revolves around the complexities of revenge and emotions. The quote highlights the idea that revenge is more impactful when it comes from a place of accumulated anger and bitterness. It suggests that taking the time to cultivate those feelings enhances the experience and effectiveness of revenge, emphasizing the emotional journey involved.

The story plays with the notion of how unresolved feelings can influence one's actions and decisions. It underscores the importance of processing emotions and the consequences that arise when one seeks to act on feelings of hurt or betrayal. Through its characters, the novel explores the limits of vengeance and the potential pitfalls of allowing negative feelings to dictate behavior.