To such a philosophy of the variations of the beautiful, Lessing's analysis of the spheres of sculpture and poetry, in the Laocoon, was an important contribution. But a true appreciation of these things is possible only in the light of a whole system of such art- casuistries. Now painting is the art in the criticism of which this truth most needs enforcing, for it is in popular judgments on pictures that the false generalisation of all art into forms of poetry is most prevalent. To suppose that all is mere technical acquirement in delineation or touch, working through [132] and addressing itself to the intelligence, on the one side, or a merely poetical, or what may be called literary interest, addressed also to the pure intelligence, on the other:--this is the way of most spectators, and of many critics, who have never caught sight all the time of that true pictorial quality which lies between, unique pledge, as it is, of the possession of the pictorial gift, that inventive or creative handling of pure line and colour, which, as almost always in Dutch painting, as often also in the works of Titian or Veronese, is quite independent of anything definitely poetical in the subject it accompanies. It is the drawing--the design projected from that peculiar pictorial temperament or constitution, in which, while it may possibly be ignorant of true anatomical proportions, all things whatever, all poetry, all ideas however abstract or obscure, float up as visible scene or image: it is the colouring--that weaving of light, as of just perceptible gold threads, through the dress, the flesh, the atmosphere, in Titian's Lace-girl, that staining of the whole fabric of the thing with a new, delightful physical quality. This drawing, then--the arabesque traced in the air by Tintoret's flying figures, by Titian's forest branches; this colouring--the magic conditions of light and hue in the atmosphere of Titian's Lace-girl, or Rubens's Descent from the Cross:--these essential pictorial qualities must first of all delight the sense, delight it as [133] directly and sensuously as a fragment of Venetian glass; and through this delight alone become the vehicle of whatever poetry or science may lie beyond them in the intention of the composer. In its primary aspect, a great picture has no more definite message for us than an accidental play of sunlight and shadow for a few moments on the wall or floor: is itself, in truth, a space of such fallen light, caught as the colours are in an Eastern carpet, but refined upon, and dealt with more subtly and exquisitely than by nature itself. And this primary and essential condition fulfilled, we may trace the coming of poetry into painting, by fine gradations upwards; from Japanese fan-painting, for instance, where we get, first, only abstract colour; then, just a little interfused sense of the poetry of flowers; then, sometimes, perfect flower-painting; and so, onwards, until in Titian we have, as his poetry in the Ariadne, so actually a touch of true childlike humour in the diminutive, quaint figure with its silk gown, which ascends the temple stairs, in his picture of the Presentation of the Virgin, at Venice.