…the existence of a center and the existence of a local symmetry are closely related. Wherever there is a local symmetry there tends to be a center. …overall symmetry in a system, by itself, is not a strong source of life or of wholeness…oversimplified overall symmetries in buildings is most often naïve and even brutal (p 186). In many cases a symmetry is used to establish an elementary center. Indeed an overwhelming majority of centers are locally symmetrical….local symmetries provide a glue which binds the field of centers, thus making centers more coherent (p 194).