Nature is therefore a connected system of living beings in the process of development from Form to Form, approximating the Deity and existing as the potentiality of the Deity. There is a graded scale of things of relative worth. But the double standard of estimating the worth of nature-objects――that of mechanical necessity and that of teleological cause――makes _two different series_, which find their union only at the end in God. From our foregoing description of the nature of God, it will be seen that he has two essential characteristics: he is Being who ever rests within himself and remains like himself; and he is a pure reason. He therefore combines in himself the two nature series in their most ideal character. _Nature-objects in the series of mechanical necessity_ have as their ideal character just that uniformity, regularity, and order that we find in the abiding Being of God. The greater the uniformity, the more nearly like God. _Nature-objects, in the teleological series_, have as their ideal characteristic the reason of God. The more nearly rational such a living being is, the more nearly is it like God. In the one line the series of phenomena ascends from the disorder of the terrestrial universe to the absolute uniformity of the stars, which are close to God. In the other line the series ascends in teleological values from the mechanical and vegetative characteristics of organisms to their rational activity. Both series terminate in God. The stars have rational intelligence and the most uniform motions. Aristotle conceived Physics as the science that includes the first series, and the second series he conceived to be included by Psychology, Ethics, and Politics.