To express protuberance by actual relief--to express the softness of flesh by the softness of wax, seems rude and inartificial, and creates no grateful surprise. But to express distances on a plain surface, softness by hard bodies, and particular colouring by materials which are not singly of that colour, produces that magic which is the prize and triumph of art. Carry this principle a step further. Suppose the effect of imitation to be fully compassed by means still more inadequate; let the power of a few well-chosen strokes, which supersede labour by judgment and direction, produce a complete impression of all that the mind demands in an object; we are charmed with such an unexpected happiness of execution, and begin to be tired with the superfluous diligence, which in vain solicits an appetite already satiated. The properties of all objects, as far as a Painter is concerned with them, are, the outline or drawing, the colour, and the light and shade. The drawing gives the form, the colour its visible quality, and the light and shade its solidity. Excellence in any one of these parts of art will never be acquired by an artist, unless he has the habit of looking upon objects at large, and observing the effect which they have on the eye when it is dilated, and employed upon the whole, without seeing any one of the parts distinctly. It is by this that we obtain the ruling characteristic, and that we learn to imitate it by short and dexterous methods. I do not mean by dexterity a trick or mechanical habit, formed by guess, and established by custom; but that science, which, by a profound knowledge of ends and means, discovers the shortest and surest way to its own purpose. If we examine with a critical view the manner of those painters whom we consider as patterns, we shall find that their great fame does not proceed from their works being more highly finished than those of other artists, or from a more minute attention to details, but from that enlarged comprehension which sees the whole object at once, and that energy of art which gives its characteristic effect by adequate expression.