Besides, that intelligence and reason are not things completed, for ever arrested in their inner structure, that they evolve and expand, is a fact: the place of discovery is precisely the residual fringe of which we were speaking above. In this respect, the history of thought would furnish examples in plenty. Intuitions at first obscure, and only anticipated, facts originally admitting no comparison, and as it were irrational, become instructive and luminous by the fruitful use made of them, and by the fertility which they manifest. In order to grasp the complex content of reality, the mind must do itself violence, must awaken its sleeping powers of revealing sympathy, must expand till it becomes adapted to what formerly shocked its habits so much as almost to seem contradictory to it. Such a task, moreover, is possible: we work out its differential every moment, and its complete whole appears in the sequence of centuries. At bottom, the new theory of knowledge has nothing new in it except the demand that all the facts shall be taken into account: it renews duration in the thinking mind, and places itself at the point of view of creative invention, not only at that of subsequent demonstration. Hence its conception of experience, which, for it, is not simple information, fitted into pre-existing frames, but elaboration of the frames themselves. Hence the problem of reason changes its aspect. A great mistake has been made in thinking that Mr Bergson's doctrine misunderstands it: to deny it and to place it are two different things. In its inmost essence, reason is the demand for unity; that is why it is displayed as a faculty of synthesis, and why its essential act is presented as apperception of relation. It is unifying activity, not so much by a dialectic of harmonious construction as by a view of reciprocal implication. But all that, however shaded we suppose it, entails a previous analysis. Therefore if we place ourselves in a perspective of intuition, I mean, of complete perception, the demand for reason appears second only, without being deprived, however, of its true task: it is an echo and a recollection, an appeal and a promise of profound continuity, our original anticipation and our final hope, in the bosom of the elementary atomism which characterises the transitory region of language; and reason thus marks the zone of contact between intelligence and instinct.