every particular, become part and parcel of ourselves, for better or for worse, like the tools we handle, the boats we steer, the horses we ride and groom, and the furniture and utensils among which and through whose help we live our lives. II. Furniture and utensils; things which exist because we require them, which we know because we employ them, these are the type of all great works of art. And from the selfsame craving which insists that these should be shapely as well as handy, pleasant to the eye as well as rational; through the selfsame processes of seeing and remembering and altering their shapes--according to the same aesthetic laws of line and curve, of surface and projection, of spring and restraint, of clearness and compensation; and for the same organic reasons and by the same organic methods of preference and adaptation as these humblest things of usefulness, do the proudest and seemingly freest works of art come to exist; come to be _just what they are_, and even come _to be at all_. I should like to state very clearly, before analysing its reasons, what seems to me (and I am proud to follow Ruskin in this as in so many essential questions of art and life) the true formula of this matter. Namely: that while beauty has always been desired and obtained for its own sake, the works in which we have found beauty embodied, and the arts which have achieved beauty's embodying, have always started from impulses or needs, and have always aimed at purposes or problems entirely independent of this embodiment of beauty. III. The desire for beauty stands to art as the desire for righteousness stands to conduct. People do not feel and act from a desire to feel and act righteously, but from a hundred different and differently-combined motives; the desire for righteousness comes in to regulate this feeling and acting, to subject it all to certain preferences and repugnances which have become organic, if not in the human being, at least in human society. Like the desire for righteousness, the desire for beauty is not a spring of action, but a regulative function; it decides the _how_ of visible existence; in accordance with deep-seated and barely guessed at necessities of body and soul, of nerves and perceptions, of brain and judgments; it says to all visible objects: since you needs must be, you shall be in _this_ manner, and not in that other. The desire for beauty, with its more potent negative, the aversion to ugliness, has, like the sense of right and wrong, the force of a categorical imperative.