In "Eleanor Oliphant Is Completely Fine," the protagonist, Eleanor, experiences a gradual awakening to her emotions, leading her to recognize the feeling of happiness. This realization brings about a transformative moment in her life, as it contrasts sharply with her previous isolation and struggles. The depiction of happiness as a light, calming sensation emphasizes how profound and almost foreign this emotion is to her.

As Eleanor reflects on this strange feeling, likening it to having "swallowed sunshine," the author illustrates the powerful impact of emotional awareness. This vibrant imagery conveys the warmth and brightness that happiness can bring, highlighting her growth and the potential for positive change within her life. It captures Eleanor's journey towards understanding and embracing her feelings.