It may seem as if the large uncertainties which we have indicated detract in a ruinous manner from the value of the _Poetics_ to us as a work of criticism. Certainly if any young writer took this book as a manual of rules by which to 'commence poet', he would find himself embarrassed. But, if the book is properly read, not as a dogmatic text-book but as a first attempt, made by a man of astounding genius, to build up in the region of creative art a rational order like that which he established in logic, rhetoric, ethics, politics, physics, psychology, and almost every department of knowledge that existed in his day, then the uncertainties become rather a help than a discouragement. They give us occasion to think and use our imagination. They make us, to the best of our powers, try really to follow and criticize closely the bold gropings of an extraordinary thinker; and it is in this process, and not in any mere collection of dogmatic results, that we shall find the true value and beauty of the _Poetics_. The book is of permanent value as a mere intellectual achievement; as a store of information about Greek literature; and as an original or first-hand statement of what we may call the classical view of artistic criticism. It does not regard poetry as a matter of unanalysed inspiration; it makes no concession to personal whims or fashion or _ennui_. It tries by rational methods to find out what is good in art and what makes it good, accepting the belief that there is just as truly a good way, and many bad ways, in poetry as in morals or in playing billiards. This is no place to try to sum up its main conclusions. But it is characteristic of the classical view that Aristotle lays his greatest stress, first, on the need for Unity in the work of art, the need that each part should subserve the whole, while irrelevancies, however brilliant in themselves, should be cast away; and next, on the demand that great art must have for its subject the great way of living. These judgements have often been misunderstood, but the truth in them is profound and goes near to the heart of things. Characteristic, too, is the observation that different kinds of art grow and develop, but not indefinitely; they develop until they 'attain their natural form'; also the rule that each form of art should produce 'not every sort of pleasure but its proper pleasure'; and the sober language in which Aristotle, instead of speaking about the sequence of events in a tragedy being 'inevitable', as we bombastic moderns do, merely recommends that they should be 'either necessary or probable' and 'appear to happen because of one another'.