"...because a garden is in part a scene intended for viewing, its design shares the two-dimensional, depictive quality of painting or drawing. But because it is also a space through which you move, the garden must also be handled as a sculpture. Unlike sculpture, however, a garden is constantly changing, and so, like music and dance, is an art form with a fourth dimension, that of time. In part, this dimension of time and change is a function of how we experience gardens, which is typically as a progression of sights, smells, textures, and views. Managing that involves a process that the gifted San Franscisco garden designer William Peters has defined as 'choreographing a walk.'" p. xix
Given my love of gardening and dance, I could end there. But...
"A garden changes through the natural processes of growth and death. The living elements of the garden are always expanding or shrinking, changing color, texture, even form, with the seasons. It's this that makes garden design so uniquely challenging and rewarding. The choreographer or the composer sets the time in a dance or ballad; in the garden, nature keeps the beat, which means that the progress, even for the most expert gardener, is always unpredictable. A garden is always, ultimately, a mystery." p. xx
From The Artful Garden by James van Sweden