On dismissing the practical and the scientific man because they were _thinking away from aspects to things,_ I attempted to inventory the _aspect_ in whose contemplation their aesthetic companion had remained absorbed. There were the colours, that delicious recently-washed blue, that lilac and russet, which gave the man his immediate shock of passive and (as much as smell and taste) bodily pleasure. But besides these my inventory contained another kind of item: what I described as a fan-like arrangement of sharply convergent lines and an exquisitely phrased sky-line of hills, picked up at rhythmical intervals into sharp crests and dropping down merely to rush up again in long rapid concave curves. And besides all this, there was the outline of a distant mountain, rising flamelike against the sky. It was all these items made up of _lines_ (skyline, outline, and lines of perspective!) which remained unchanged when the colours were utterly changed by looking through stained glass, and unchanged also when the colouring was reduced to the barest monochrome of a photograph or a pencil drawing; nay remained the same despite all changes of scale in that almost colourless presentment of them. Those items of the aspect were, as we all know, _Shapes._ And with altered colours, and colours diminished to just enough for each line to detach itself from its ground, those Shapes could be contemplated and called beautiful. CHAPTER V PERCEPTION OF RELATIONS WHY should this be the case? Briefly, because colours (and sounds) as such are forced upon us by external stimulation of our organs of sight and hearing, neither more nor less than various temperatures, textures, tastes and smells are forced upon us from without through the nervous and cerebral mechanism connected with our skin, muscle, palate and nose. Whereas shapes instead of being thus nilly willy _seen_ or _heard,_ are, at least until we know them, _looked_ at or _listened_ to, that is to say _taken in_ or _grasped,_ by mental and bodily activities which meet, but may also refuse to meet, those sense stimulations. Moreover, because these mental and bodily activities, being our own, can be rehearsed in what we call our memory without the repetition of the sensory stimulations which originally started them, and even in the presence of different ones.