Men were induced to follow Rousseau in his surrender to the emotions, it will be remembered, because that seemed the only alternative to a hard and dry rationalism. The rationalists of the Enlightenment were for the most part Cartesians, but Kant himself is in his main trend a rationalist. The epithet critical usually applied to his philosophy is therefore a misnomer. For to solve the critical problem--the relation between appearance and reality--it is necessary to deal adequately with the rôle of the imagination and this Kant has quite failed to do.[301] Modern philosophy is in general so unsatisfactory because it has raised the critical problem without carrying it through; it is too critical to receive wisdom through the traditional channels and not critical enough to achieve insight, and so has been losing more and more its human relevancy, becoming in the words of one of its recent votaries, a “narrow and unfruitful eccentricity.” The professional philosophers need to mend their ways and that speedily if the great world is not to pass them disdainfully by and leave them to play their mysterious little game among themselves. We see one of the most recent groups, the new realists, flat on their faces before the man of science--surely an undignified attitude for a philosopher. It is possible to look on the kind of knowledge that science gives as alone real only by dodging the critical problem--the problem as to the trustworthiness of the human instrument through which all knowledge is received--and it would be easy to show, if this were the place to go into the more technical aspects of the question, that the new realists have been doing just this--whether through sheer naïveté or metaphysical despair I am unable to say. The truly critical observer is unable to discover anything real in the absolute sense since everything is mixed with illusion. In this absolute sense the man of science must ever be ignorant of the reality behind the shows of nature. The new realist is, however, justified relatively in thinking that the only thing real in the view of life that has prevailed of late has been its working according to the natural law and the fruits of this working. The self-deception begins when he assumes that there can be no other working. What I have myself been opposing to naturalistic excess, such as appears in the new realism, is insight; but insight is in itself only a word, and unless it can be shown to have its own working and its own fruits, entirely different from those of work according to the natural law, the positivist at all events will have none of it.