from the adequate objectification of the will, is expressed by an _outer necessity_ in the whole of these manifestations themselves, by reason of which man has need of the beasts for his support, the beasts in their grades have need of each other as well as of plants, which in their turn require the ground, water, chemical elements and their combinations, the planet, the sun, rotation and motion round the sun, the curve of the ellipse, &c., &c. At bottom this results from the fact that the will must live on itself, for there exists nothing beside it, and it is a hungry will. Hence arise eager pursuit, anxiety, and suffering. It is only the knowledge of the unity of will as thing-in-itself, in the endless diversity and multiplicity of the phenomena, that can afford us the true explanation of that wonderful, unmistakable analogy of all the productions of nature, that family likeness on account of which we may regard them as variations on the same ungiven theme. So in like measure, through the distinct and thoroughly comprehended knowledge of that harmony, that essential connection of all the parts of the world, that necessity of their gradation which we have just been considering, we shall obtain a true and sufficient insight into the inner nature and meaning of the undeniable _teleology_ of all organised productions of nature, which, indeed, we presupposed _a priori_, when considering and investigating them. This _teleology_ is of a twofold description; sometimes an _inner teleology_, that is, an agreement of all the parts of a particular organism, so ordered that the sustenance of the individual and the species results from it, and therefore presents itself as the end of that disposition or arrangement. Sometimes, however, there is an _outward teleology_, a relation of unorganised to organised nature in general, or of particular parts of organised nature to each other, which makes the maintenance of the whole of organised nature, or of the particular animal species, possible, and therefore presents itself to our judgment as the means to this end.