Knowledge, then, in this ethical sphere means the harmony of will, emotion, intellect: it means the clear light which has no illusions and no deceptions. And to those who feel that much of their life and of the common life is founded on prejudice and illusion, such white light will occasionally seem hard and steely. At its approach they fear the loss of the charm of that twilight hour ere the day has yet begun, or before the darkness has fully settled down. Thus the heart and feelings look upon the intellect as an enemy of sentiment. And Plato himself is not without anticipations of such an issue. Yet perhaps we may add that the danger is in part an imaginary one, and only arises because intelligence takes its task too lightly, and encroaches beyond its proper ground. Philosophy, in other words, mistakes its place when it sets itself up as a dogmatic system of life. Its function is to comprehend, and from comprehension to criticise, and through criticising to unify. It has no positive and additional teaching of its own: no addition to the burden of life and experience. And experience it must respect. Its work is to maintain the organic or super-organic interconnexion between all the spheres of life and all the forms of reality. It has to prevent stagnation and absorption of departments—to keep each in its proper place, but not more than its place, and yet to show how each is not independent of the others. And this is what the philosopher or ancient sage would be. If he is passionless, it is not that he has no passions, but that they no longer perturb and mislead. If his controlling spirit be reason, it is not the reason of the so-called “rationalist,” but the reason which seeks in patience to comprehend, and to be at home in, a world it at first finds strange. And if he is critical of others, he is still more critical of himself: critical however not for criticism’s sake (which is but a poor thing), but because through criticism the faith of reason may be more fully justified. To the last, if he is true to his mission and faithful to his loyalty to reality, he will have the simplicity of the child. Whether therefore we agree or not with Plato’s reduction of Right and Duty to self-actualisation, we may at least admit that in the idea of perfection or excellence, combined with the idea of knowledge or inward lucidity, he has got the fundamental ideas on which further ethical development must build. Self-control, self-knowledge, internal harmony, are good: and so are the development of our several faculties and of the totality of them to the fullest pitch of excellence. But their value does not lie entirely in themselves, or rather there is implicit in them a reference to something beyond themselves. They take for granted something which, because it is so taken, may also be ignored and neglected, just because it seems so obvious. And that implication is the social humanity in which they are the spirits of light and leading.