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Rh significance—all moral and social achievement. Plato, however, makes right knowledge of man and society depend upon knowledge of the essential features of nature. His chief treatise, entitled the Republic, is at once a treatise on morals, on social organization, and on the metaphysics and science of nature. Since he accepts the Socratic doctrine that right achievement in the former depends upon rational knowledge, he is compelled to discuss the nature of knowledge. Since he accepts the idea that the ultimate object of knowledge is the discovery of the good or end of man, and is discontented with the Socratic conviction that all we know is our own ignorance, he connects the discussion of the good of man with consideration of the essential good or end of nature itself. To attempt to determine the end of man apart from a knowledge of the ruling end which gives law and unity to nature is impossible. It is thus quite consistent with his philosophy that he subordinates literary studies (under the name of music) to mathematics and to physics as well as to logic and metaphysics. But on the other hand, knowledge of nature is not an end in itself; it is a necessary stage in bringing the mind to a realization of the supreme purpose of existence as the law of human action, corporate and individual. To use the modern phraseology, naturalistic studies are indispensable, but they are in the interests of humanistic and ideal ends.

Aristotle goes even farther, if anything, in the direction of naturalistic studies. He subordinates (Ante, p. ) civic relations to the purely cognitive life. The highest end of man is not human but divine—participation in pure knowing which constitutes the divine life. Such knowing deals with what is universal and necessary, and finds, therefore, a more adequate subject matter in nature at its best than in the transient things of man. If we take what the philosophers stood for in Greek life, rather than the details of what they say, we might summarize by saying that the Greeks were too much interested in free inquiry into natural fact and in the