What does he do? How shall we recognise him? Mr Eliot puts before us Coleridge and Aristotle and Dryden as literary critics _par excellence_ arranged in an ascending scale of purity. The concatenation is curious, for these were men possessed of very different interests and faculties of mind; and it would occur to few to place Dryden, as a critic, at their head. The living centre of Aristotle's criticism is a conception of art as a means to a good life. As an activity, poetry 'is more philosophic than history,' a nearer approach to the universal truth in appearances; and as a more active influence, drama refines our spiritual being by a purgation of pity and terror. Indeed, it would not be an exaggeration to say that the very pith and marrow of Aristotle's literary criticism is a system of moral values derived from his contemplation of life. It was necessary that this relation should exist, because for Aristotle literature was, essentially, an imitation of life though we must remember to understand imitation according to our final sense of the theme which is the golden, persistent thread throughout the Poetics. The imitation of life in literature was for Aristotle, the creative revelation of the ideal actively at work in human life. The tragic hero failed because his composition was less than ideal; but he could only be a tragic hero if the ideal was implicit in him and he visibly approximated to it. It is this constant reference to the ideal which makes of 'imitation' a truly creative principle and the one which, properly understood, is the most permanently valid and pregnant of all; it is also one which has been constantly misunderstood. Its importance is, nevertheless, so central that adequate recognition of it might conceivably be taken as the distinguishing mark of all fruitful criticism. To his sympathetic understanding of this principle Coleridge owed a great debt. It is true that his efforts to refine upon it were not only unsuccessful, but a trifle ludicrous; his effort to graft the vague transcendentalism of Germany on to the rigour and clarity of Aristotle was, from the outset, unfortunately conceived. But the root of the matter was there, and in Coleridge's fertile mind the Aristotelian theory of imitation flowered into a magnificent conception of the validity and process of the poetic imagination. And partly because the foundation was truly Aristotelian, partly because Coleridge had known what it was to be a great poet, the reference to life pervades the whole of what is permanently valuable in Coleridge's criticism. In him, too, there is a strict and mutually fertilising relation between the moral and the æsthetic values. This is the firm ground beneath his feet when he--too seldom--proceeds to the free exercise of his exquisite æsthetic discrimination.