Rabbi Margles cites Talmud Sukkah 12a, which instructs us to take the husks, bare vines, and dry stalks—leftovers—for the roof of the Sukkah. This seems contradictory to the mitzvah. For instance, we are instructed to choose the most beautiful etrog available, and decorate the Sukkah. She cites Rabbi Gershon Chanoch Henoch Leiner of Radzyn who taught about the spiritual significance of the holy refuse. Read the article