In "Shopgirl" by Steve Martin, the character Mirabelle is depicted as someone who possesses a bright and cheerful demeanor that she reserves for particular moments. This suggests that her sunny disposition isn't her constant state but rather a special quality she can tap into when needed. It highlights her complexity and the fact that her everyday life may be more subdued or challenging.
The quote emphasizes the contrast between Mirabelle’s typical experiences and the moments where she shines. It reveals an aspect of her personality that she selectively showcases, suggesting her depth and the emotional layers she navigates. This idea resonates throughout the narrative, illustrating how individuals often hide their true selves behind a façade for the sake of survival or connection.