Aristotle left a vast number of writings, of which the smaller (perhaps a fourth), but unquestionably the more important portion have come down to us, though in a form which cannot be received without some scruples. The story of Strabo about the fate of the Aristotelian writings, and the injury which they suffered in a cellar at Scepsis, is confessedly a fable, or at least limited to the original manuscripts; but the fragmentary and descriptive form which many among them, and even the most important (_e. g._ the metaphysics) possess, the fact that scattered portions of one and the same work (_e. g._ the ethics) are repeatedly found in different treatises, the irregularities and striking contradictions in one and the same writing, the disagreement found in other particulars among different works, and the distinction made by Aristotle himself between acroamatic and exoterical writings, all this gives reason to believe that we have, for the most part, before us only his oral lectures written down, and subsequently edited by his scholars. II. UNIVERSAL CHARACTER AND DIVISION OF THE ARISTOTELIAN PHILOSOPHY.—With Plato, philosophy had been national in both its form and content, but with Aristotle, it loses its Hellenic peculiarity, and becomes universal in scope and meaning; the Platonic dialogue changes into barren prose; a rigid, artistic language takes the place of the mythical and poetical dress; the thinking which had been with Plato intuitive, is with Aristotle discursive; the immediate beholding of reason in the former, becomes reflection and conception in the latter. Turning away from the Platonic unity of all being, Aristotle prefers to direct his attention to the manifoldness of the phenomenal; he seeks the idea only in its concrete actualization, and consequently grasps the particular far more prominently in its peculiar determinateness and reciprocal differences, than in its connection with the idea. He embraces with equal interest the facts given in nature, in history, and in the inner life of man. But he ever tends toward the individual, he must ever have a fact given in order to develope his thought upon it; it is always the empirical, the actual, which solicits and guides his speculation; his whole course is a description of the facts given, and only merits the name of a philosophy because it comprehends the empirical in its totality and synthesis; because it has carried out its induction to the farthest extent. Only because he is the absolute empiricist may Aristotle be called the truly philosopher. This character of the Aristotelian philosophy explains at the outset its encyclopedian tendency, inasmuch as every thing given in experience is equally worthy of regard and investigation. Aristotle is thus the founder of many courses of study unknown before him; he is not only the father of logic, but also of natural history, empirical psychology, and the science of natural rights.