Space-Time then is in Kantian language an infinite given whole, that is to say, it is experienced as such, where the term experience includes thought as well as sensible experience. Its elements are represented conceptually as point-instants or bare events; and we have added the hypothesis that other empirical things or existents are groupings of such events, whirlpools within that ocean, or they are crystals in that matrix. Only whereas a crystal may be separated from its matrix, existents never can; they remain swimming in the medium of Space-Time. Their very being is continuity; they are themselves continuously connected groupings of motions, and they are connected through the circumambient Space-Time with other such groupings or complexes. In less metaphorical language, they are complexes of motion differentiated within the one all-containing and all-encompassing system of motion. Primarily, therefore, empirical existents are spatio-temporal and remain so to the end. But with certain groupings of motion, certain spatio-temporal complexes, there are correlated what we call qualities, such as materiality, life, colour, consciousness.