In "My Not So Perfect Life," Sophie Kinsella highlights the duality of life, where the bright and shiny aspects are often balanced by underlying challenges and truths. The message encourages readers to remember that everyone presents a facade of perfection, yet they all grapple with their own struggles. This serves as a reminder that appearances can be deceiving, and that everyone experiences hardship alongside their successes.

Kinsella emphasizes the importance of perspective, suggesting that when we encounter our own difficulties, we shouldn't lose hope. Instead, we should recognize that everyone has their own version of a "crappy truth." This understanding can help foster empathy and a more balanced view of life, allowing us to appreciate the good amidst the imperfections we all face.