People are like stained-glass windows that shine brightly when the sun is out but reveal their true beauty from an inner light in darkness. The document pays tribute to the author's beautiful sisters - Jebie, Emiey, Melvyn, Che, Chen, Joan, and Dorothy. It notes that while not everyone has the privilege of sisters, those with sisters develop very close friendships, and some develop sister-like relationships with other girls despite no biological connection, though being sisters biologically can deepen the relationship further if developed properly.