There is a mobile centre of gravity in experience (Erlebnis). All of that is metaphor. It is called a centre because it is taken to be an experiencer distinguished in principle from experience (= that which is experienced), and strictly (that is, both logically and evidently) equidistant from all such content of experience, including all the phases that are assumed to be more 'inward'. And in terms of 'gravity' because gravity represents the general notion of fields of force, (and lately too, curvature or distortion of space), both attractive and repulsive, which are effects of the believed-in existence of other such centres in ideal proximity. So desire and every form of interpellation are comprehended in such gravitational effects. The centre is then is the complementary aggregate of the ways that others see you and feel towards you, since you can't see yourself. But the way that others see you is pure fiction and so, with experience (Erfahrung), can be mostly internalised so that your identity, or concept of the centre, remains tolerably stable. The centre is mobile because it evidently changes from scene to scene, changes in every salient way, while yet appearing to be the same, and identified with the source of experience (Erlebnis), with the nature of the experiencing itself, which when projected outward into the fictional reality of its world is (at this point in history) called consciousness. It is diabolic, the way this all seems to fit together perfectly, the way that it seems to capture all of your best intentions, your every fantasy of Enlightenment, in the Western sense of that word.