In order that we may rise to free action, opposition is needed, and this we get in the spatial-temporal world of phenomena, or nature, which the ego creates for itself in order to have resistance to overcome. Fichte conceives of nature as "the material of our duty," as the obstacle against which the ego can exercise its freedom. There could be no free action without something to act upon, and there could be no purposive action without a world in which everything happens according to law; and such a causal world we have in our phenomenal order, which is the product of the absolute spiritual principle. By the ego Fichte did not mean the subjective ego, the particular individual self with all its idiosyncrasies, but the universal ego, the reason that manifests itself in all conscious individuals as universal and necessary truth. In his earlier period he did not define his thought very carefully, but in time the absolute ego came to be conceived as the principle of all life and consciousness, as universal life, and ultimately identified with God. His philosophy is, therefore, not subjective idealism, although it was so misinterpreted, but objective idealism; nature is not the creation of the particular individual ego, but the phenomenal expression, or reflection, in the subject of the universal spiritual principle. Upon such an idealistic world-view Fichte based the ethical teachings through which he exercised a lasting influence upon the German people and the history of human thought. The universal ego is a moral ego, an ego with an ethical purpose, that realizes itself in nature and in man; it is, therefore, the vocation of man to obey the voice of duty and to free himself from the bondage of nature, to be a person, not a thing, to coöperate in the realization of the eternal purpose which is working itself out in the history of humanity, to sacrifice himself for the ideal of freedom. Every individual has his particular place in which to labor for the social whole; how to do it, his conscience will tell him without fail. And so, too, the German people has its peculiar place in civilization, its unique contribution to make in the struggle of the human race for the development of free personality. It is Germany's mission to regain its nationality, in order that it may take the philosophical leadership in the work of civilization, and to establish a State based upon personal liberty, a veritable kingdom of justice, such as has never appeared on earth, which shall realize freedom based upon the equality of all who bear the human form.