which a shape undergoes, every shape, actively perceived, having its own special _movement of lines;_ and every _movement of lines,_ or _combination of movements of lines_ existing in proportion as we go over and over again the particular shape of which it is a quality. The case is absolutely reversed when we perceive or think of, the _locomotion of things._ The thought of a thing's locomotion, whether locomotion done by itself or inflicted by something else, necessitates our thinking away from the particular shape before us to another shape more or less different. In other words locomotion necessarily alters what we are looking at or thinking of. If we think of Michel Angelo's seated Moses as getting up, we think _away_ from the approximately pyramidal shape of the statue to the elongated oblong of a standing figure. If we think of the horse of Marcus Aurelius as taking the next step, we think of a straightened leg set on the ground instead of a curved leg suspended in the air. And if we think of the Myronian Discobolus as letting go his quoit and "recovering," we think of the matchless spiral composition as unwinding and straightening itself into a shape as different as that of a tree is different from that of a shell. The pictorial representation of locomotion affords therefore the extreme example of the difference between discursive thinking about things and contemplation of shape. Bearing this example in mind we cannot fail to understand that, just as the thought of _locomotion_ is opposed to the thought of _movement of lines,_ so, in more or less degree, the thought of the objects and actions represented by a picture or statue, is likely to divert the mind from the pictorial and plastic shapes which do the representing. And we can also understand that the problem unconsciously dealt with by all art (though by no means consciously by every artist) is to execute the order of suggesting interesting facts about things in a manner such as to satisfy at the same time the aesthetic demand for shapes which shall be satisfactory to contemplate. Unless this demand for sensorially, intellectually and empathically desirable shapes be complied with a work of art may be interesting as a diagram, a record or an illustration, but once the facts have been conveyed and assimilated with the rest of our knowledge, there will remain a shape which we shall never want to lay eyes upon. I cannot repeat too often that the differentiating characteristic of art is that it gives its works a value for contemplation independent of their value for fact-transmission, their value as nerve-and-emotion-excitant and of their value for immediate, for practical, utility. This aesthetic value, depending upon the unchanging processes of perception and empathy, asserts itself in answer to every act of contemplative attention, and is as enduring and intrinsic as the other values are apt to be momentary and relative. A Greek vase with its bottom