of the most obscure of all that may legitimately be submitted to human reason; and the idea is itself so varied in the minds of different men, according to their subjects of study, that no definition can be expected to embrace more than a certain number of its infinitely multiplied forms. XII. That peculiar character, however, which separates the picturesque from the characters of subject belonging to the higher walks of art (and this is all that is necessary for our present purpose to define), may be shortly and decisively expressed. Picturesqueness, in this sense, is _Parasitical Sublimity_. Of course all sublimity, as well as all beauty, is, in the simple etymological sense, picturesque, that is to say, fit to become the subject of a picture; and all sublimity is, even in the peculiar sense which I am endeavoring to develope, picturesque, as opposed to beauty; that is to say, there is more picturesqueness in the subject of Michael Angelo than of Perugino, in proportion to the prevalence of the sublime element over the beautiful. But that character, of which the extreme pursuit is generally admitted to be degrading to art, is _parasitical_ sublimity; _i.e._, a sublimity dependent on the accidents, or on the least essential characters, of the objects to which it belongs; and the picturesque is _developed distinctively exactly in proportion to the distance from the centre of thought of those points of character in which the sublimity is found_. Two ideas, therefore, are essential to picturesqueness,--the first, that of sublimity (for pure beauty is not picturesque at all, and becomes so only as the sublime element mixes with it), and the second, the subordinate or parasitical position of that sublimity. Of course, therefore, whatever characters of line or shade or expression are productive of sublimity, will become productive of picturesqueness; what these characters are I shall endeavor hereafter to show at length; but, among those which are generally acknowledged, I may name angular and broken lines, vigorous oppositions of light and shadow, and grave, deep, or boldly contrasted color; and all these are in a still higher degree effective, when, by resemblance or association, they remind us of objects on which a true and essential sublimity exists, as of rocks or mountains, or stormy clouds or waves. Now if these characters, or any others of a higher and more abstract sublimity, be found in the very heart and substance of what we contemplate, as the sublimity of Michael Angelo depends on the expression of mental character in his figures far more than even on the noble lines of their arrangement, the art which represents such characters cannot be properly called picturesque: but, if they be found in the accidental or external qualities, the distinctive picturesque will be the result.