The ingenious Bernays has said that it was all the fault of Aristotle. The last phrase of the famous definition in the "Poetics," which should relate the nature, end, and aim of tragedy, is left, in his works as we have them, probably through the suppression or loss of context, without elucidating commentary. And the writers on tragedy have ever since so striven to guess his meaning, and to make their answers square with contemporary drama, that they have given comparatively slight attention to the immediate, unbiased investigation of the phenomenon itself. Aristotle's definition is as follows:<1> "Tragedy, then, is an imitation of an action that is serious, complete, and of a certain magnitude; in language embellished with each kind of artistic ornament, the several kinds being found in separate parts of the play: in the form of action, not of narrative; through pity and fear effecting the proper purgation of these emotions." In what follows, he takes up and explains this definition, phrase by phrase, until the very last. What is meant by the Purgation (Katharsis) through pity and fear? It is at least what tragedy "effects," and is thus evidently the function of tragedy. But a thing is determined, constructed, judged, according to its function; the function is, so to speak, its genetic formula. With a clear view of that, the rest of the definition could conceivably have been constructed without further explanation; without it, the key to the whole fails. "Purgation of these emotions;" did it mean purification of the emotions, or purgation of the soul FROM the emotions? And what emotions? Pity and fear, or "these and suchlike," thus including all emotions that tragedy could bring to expression? <1> S.H. Butcher, _Aristotle's Theory of Poetry and Fine Art_, 1895. Our knowledge of the severely moral bent of the explicit art criticism of the Greeks has inclined many to accept the first interpretation; and modern interests impel in the same direction. It is natural to think of the generally elevating and softening effects of great art as a kind of moral clarifying, and the question how this should be effected just by pity and fear was not pressed. So Lessing in the "Hamburgische Dramaturgie" takes Katharsis as the conversion of the emotions in general into virtuous dispositions.