" The most notable function of Japanese art is to express the melancholy of mortality and the inevitable decay of beauty, to act as the catalyst for the experience of extreme sorrow. The mindfulness is found in every aspect of Japanese culture, in pottery, pop songs, haiku, and even in the way of tea. When it comes to achieving that desired quality of existential desolation in Japanese garden, it's moss that gets the job done. "

― Vivian Swift , Gardens of Awe and Folly: A Traveler's Journal on the Meaning of Life and Gardening