The act of faith by which these ultimate ideas are reduced to the vision of living personalities is a legitimate matter for critical scepticism. But that there are such ultimate ideas and that life cannot be interpreted without considering them is not a matter for any sort of scepticism. It is a basic assumption, without which there could be no adequate philosophy at all. It is the only intelligible assumption which covers the undeniable human experience which gathers itself together in these traditional words. CHAPTER VII. THE NATURE OF ART The only adequate clue to the historic mystery of that thing which the human race has come to call "beauty," and that other thing--the re-creation of this through individual human minds--which we have come to call "art"--is found, if the complex vision is to be trusted at all, in the contact of the emotion of love with the "objective mystery," and its consequent dispersion, as the other aspects of the soul are brought to bear upon it, into the three primordial ideas of goodness, beauty, and truth. The reason why this one particular aspect of the soul which we call emotion is found to be the synthesis of what is discovered by all the other aspects of the soul functioning together is that the nature of emotion differs radically from reason, conscience, will, imagination, taste, and the rest, in that it is not only a clarifying, directing and discriminating activity but is also--as none of these others are--an actual mood, or temper, or state of the soul, possessing certain definite vibrations of energy and a certain sort of psychic fluidity or outflowing which seems perpetually to spring up from an unfathomable depth. This synthetic role played by emotion in unifying the other activities of the complex vision and preparing the psychic material for the final activity of the apex-thought may perhaps be understood better if we think of emotion as being an actual outflowing of the soul itself, springing up from unfathomable depths. Thinking of it in this way we may conceive the actual size or volume of the "soul monad" to be increased by this centrifugal expansion. By such an increase of the soul's volume we do not mean an actual increase; because the depths of all souls are equally unfathomable when their recession inwards is considered. By such an increase we refer to the forth-flowing of the soul as it manifests itself through the physical body. Thus our theory brings us back, as all theories must if they are consonant with experience, to the traditional language of the human race. For in ordinary language there is nothing strange about the expression "a great soul." Such an expression simply refers to the volume of the soul's outflowing through the body. And this outflowing is the fulness, more or less, of the soul's well-spring of emotion.