But, though strictly considered, life is but a web of illusion and a dream within a dream, it is a dream that needs to be managed with the utmost discretion, if it is not to turn into a nightmare. In other words, however much life may mock the metaphysician, the problem of conduct remains. There is always the unity at the heart of the change; it is possible, however, to get at this real and abiding element and so at the standards with reference to which the dream of life may be rightly managed only through a veil of illusion. The problem of the One and the Many, the ultimate problem of thought, can therefore be solved only by a right use of illusion. In close relation to illusion and the questions that arise in connection with it is all that we have come to sum up in the word imagination. The use of this word, at least in anything like its present extension, is, one should note, comparatively recent. Whole nations and periods of the past can scarcely be said to have had any word corresponding to imagination in this extended sense. Yet the thinkers of the past have treated, at times profoundly, under the head of fiction or illusion the questions that we should treat under the head of imagination.[5] In the “Masters of Modern French Criticism” I was above all preoccupied with the problem of the One and the Many and the failure of the nineteenth century to deal with it adequately. My effort in this present work is to show that this failure can be retrieved only by a deeper insight into the imagination and its all-important rôle in both literature and life. Man is cut off from immediate contact with anything abiding and therefore worthy to be called real, and condemned to live in an element of fiction or illusion, but he may, I have tried to show, lay hold with the aid of the imagination on the element of oneness that is inextricably blended with the manifoldness and change and to just that extent may build up a sound model for imitation. One tends to be an individualist with true standards, to put the matter somewhat differently, only in so far as one understands the relation between appearance and reality--what the philosophers call the epistemological problem. This problem, though it cannot be solved abstractly and metaphysically, can be solved practically and in terms of actual conduct. Inasmuch as modern philosophy has failed to work out any such solution, it is hard to avoid the conclusion that modern philosophy is bankrupt, not merely from Kant, but from Descartes.