A musical phrase, or, for that matter, a musical unit of any size or shape, becomes an image whenever we imagine it to be invested with a content whose origins lie outside music. Such a content, according to the theory developed here, constitutes the image's conventional significance; it accounts for whatever strikes us about the image as having a common and familiar ring. That being so, the origins in question must be coincident with the fundamental ideas--the archetypes--that have been trad...