In "The Glass Castle" by Jeannette Walls, the author conveys a significant perspective on the importance of strengthening one's abilities, comparing it to vision and reliance on glasses. She suggests that if someone has weak eyesight, it is imperative to exercise those eyes rather than depend on glasses, which she likens to crutches. This metaphor highlights a fundamental belief in the need for personal growth and overcoming challenges rather than opting for temporary fixes.

Walls emphasizes that relying too heavily on external aids can hinder one’s ability to perceive and engage with the world independently. By advocating for the development of one's strengths, she encourages embracing struggle as part of the journey toward self-improvement and resilience. This philosophy serves as a central theme in her narrative, reinforcing the idea that true strength comes from effort and personal perseverance.