 From a Deweyan viewpoint, aesthetic experience, then, has roughly the following structure. The experience is set off by some factors, such as opening a book, directing a first glance at a painting, beginning to listen to a piece of music, entering a natural environment or a building, or beginning a meal or a conversation. As aesthetic experience is temporal, the material of the experience does not remain unchanged, but the elements initiating the experience, like reading the first lines of a book or hearing the first chord of a symphony, merge into new ones as the experience proceeds and complex relationships are formed between its past and newer phases. When these different parts form a distinctive kind of orderly developing unity that stands out from the general experiential stream of our lives, the experience in question is aesthetic.