In her book "Under the Duvet," Marian Keyes touches on various life challenges and experiences, reminding readers of the old Chinese saying, "No pain, no gain." This adage emphasizes that hardship is often a necessary part of achieving success or improvement. Keyes reflects on personal struggles, ranging from familial issues to everyday setbacks, illustrating how confronting discomfort can lead to growth and resilience.

Keyes' anecdotes resonate as she navigates the complexities of life, showcasing that adversity is often intertwined with achievements. The notion of enduring pain to reap rewards is central to her narrative, encouraging readers to embrace their own difficulties. Through her humorous and relatable storytelling, Keyes inspires individuals to find strength in their challenges and appreciate the lessons they bring.