The quote reflects a central realization of the character, who has spent much time analyzing her thoughts, akin to examining shells on a beach. This constant contemplation has made her unaware of the importance of accepting situations as they are, rather than overanalyzing them. It highlights a struggle with the complexity of thought and the simplicity of acceptance.
This moment of insight suggests that sometimes, the act of letting go and embracing reality can bring clarity and peace. By recognizing her habitual overthinking, she opens up to the possibility of experiencing life more fully, without the burden of excessive analysis. The journey from analysis to acceptance is a significant theme in her story.