The center is the meaning and the substance; the periphery is the tangible form that it assumes. The city is the field in which the alternate movements among form and substance unfold; some centrifugal, other centripetal, all centrifocal, i.e. positioned towards a center. Living in the periphery is identifying with this distance toward a supposed center, casting one's barycenter out of oneself. But on the surface of the earth there are no centers: actually, the sphere is the locus of the peripheries, being the only center inside the earth - any point on the surface is the center of its own world.