As regards the second kind of teleology, according to the division made above, the outer design, which shows itself, not in the inner economy of the organisms, but in the support and assistance they receive from without, both from unorganised nature and from each other; its general explanation is to be found in the exposition we have just given. For the whole world, with all its phenomena, is the objectivity of the one indivisible will, the Idea, which is related to all other Ideas as harmony is related to the single voice. Therefore that unity of the will must show itself also in the agreement of all its manifestations. But we can very much increase the clearness of this insight if we go somewhat more closely into the manifestations of that outer teleology and agreement of the different parts of nature with each other, an inquiry which will also throw some light on the foregoing exposition. We shall best attain this end by considering the following analogy.