It means she put her heart and soul into something, "all her world" in a "grain of sand" something so small. She is remembering it and it is bittersweet like black cherry the way she felt but also the way it ended.
It means she put her heart and soul into something, "all her world" in a "grain of sand" something so small. She is remembering it and it is bittersweet like black cherry the way she felt but also the way it ended.