In Alexander McCall Smith's "The House of Unexpected Sisters," a central theme is the idea that issues and complications can sometimes resolve on their own if given time and space. This perspective encourages a sense of patience and a belief in the natural resolution of conflicts, suggesting that overthinking problems can often exacerbate them. The narrative weaves through the lives of the characters, illustrating how their relationships and interactions can lead to unexpected outcomes.

This notion aligns with the book's overall tone, which combines light-heartedness with deeper insights into human nature. By presenting problems as manageable, McCall Smith invites readers to embrace life's unpredictability and trust that solutions can emerge organically. The story becomes a testament to the resilience of the human spirit and the importance of community support in navigating life's challenges.