Agreeably with such a content the sensuous element of art has likewise to show itself potentially adapted to such particularization and the display of such an inward content of heart and mind. Media of this description are supplied by colour, musical tones, and finally in sound as mere sign for ideal perceptions and conceptions; and we further obtain the means of realizing with the use of such media a content of this kind in the arts of painting, music, and poetry. Throughout this sphere the sensuous medium is found to be essentially disparate in itself and throughout posited[162] as ideal. In this way it responds in the highest degree to the fundamentally spiritual content of art, and the coalescence of spiritual significance and sensuous material attains a more intimate union than was possible either in architecture or sculpture. At the same time such a union is necessarily more near to soul-life, leaning exclusively to the subjective side of human experience; one which, in so far as form and content are thus constrained to particularization and to posit their result as ideal, can only be actually effected at the expense of the objective universality of the content as also of the fusion with the immediately sensuous medium[163]. The arts, then, which are lifted into a higher strain of ideality, abandoning as they do the symbolism of architecture and the classical Ideal of sculpture, accept their predominant type from the _romantic_ art-form; and these are the arts most fitted to express its mode of configuration. They are, however, a totality of arts, because the romantic type is itself essentially the most concrete. (_c_) The articulation of this _third sphere_ of the particular arts may be fixed as follows: (_α_) The _first_ art which comes next to sculpture is that of painting. It avails itself for a medium of its content and the plastic configuration of the same of visibility as such, to the extent that it is differentiated in its own nature, in other words is defined in the continuity of colour. No doubt the material of architecture and sculpture is likewise both visible and coloured. It is, however, not, as in painting, visibility in its pure nature, not the essentially simple light, which by its differentiating of itself in its opposition to darkness, and in association with that darkness gives rise to colour[164]. This quality of visibility made essentially ideal[165] and treated as such no longer either requires, as in architecture, the abstractly mechanical qualities of mass as appropriate to materials of weight, nor, as is the case with sculpture, the complete dimensuration of spatial condition, even when concentrated into organic forms. The visibility and the making apparent, which belong to painting, possess differences of quality under a more ideal mode--that is, in the specific varieties of colour--which liberates art from the objective totality of spatial condition, by being limited to a plane surface.