In the book "Shopgirl," the character Mirabelle exhibits a profound sense of self-doubt that influences her interactions with men. Despite her beauty and charm, she struggles to see her own worth, which leads her to believe that she is unworthy of attention or affection. This self-deprecating view creates a barrier that prevents her from recognizing or responding to the interest of men who might be attracted to her.

Mirabelle's inability to fathom that a man could be interested in her stems from her internal struggles and diminished self-esteem. As a result, she remains unaffected by any men's failures to approach her, illustrating how her perception of herself profoundly impacts her relationships and interactions. This theme encapsulates the broader idea of how personal insecurities can shape one's emotional experiences and connections with others.