In the book "A Woman of Substance" by Barbara Taylor Bradford, the protagonist experiences a gradual increase in life’s challenges as she strives for success. As she ascends to greater heights, she faces more significant obstacles, mirroring the notion that as one progresses in life, the difficulties amplify. This reflects a universal truth about ambition and the complexities that accompany achievement.

The quote, "Life always gets harder towards the summit - the cold increases, responsibility increases," encapsulates the essence of this struggle. It suggests that with each step toward one’s goals, not only does the burden of responsibility grow, but also the emotional and physical toll intensifies. This theme resonates throughout the narrative, emphasizing resilience in the face of adversity.