If on the contrary each is a principle, then the effective powers become a matter of chance; under what compulsion are they to hold together and act with one mind towards that work of unity, the harmony of the entire heavenly system? Again what can make it necessary that the material bodies of the heavenly system be equal in number to the Intellectual moving principles, and how can these incorporeal Beings be numerically many when there is no Matter to serve as the basis of difference? For these reasons the ancient philosophers that ranged themselves most closely to the school of Pythagoras and of his later followers and to that of Pherekudes, have insisted upon this Nature, some developing the subject in their writings while others treated of it merely in unwritten discourses, some no doubt ignoring it entirely. Ennead: V I
Movement There is pure [as self-caused] for the moving principle is not a separate thing to complicate it as it speeds. Ennead V,8,
Time in its ceaseless onward sliding produces parted interval; Eternity stands in identity, pre-eminent, vaster by unending power than Time with all the vastness of its seeming progress; Time is like a radial line running out apparently to infinity but dependent upon that, its centre, which is the pivot of all its movement; as it goes it tells of that centre, but the centre itself is the unmoving principle of all the movement. Ennead VI,5,