276 THE WORLD AS IDEA. bk. iii.
the Idea and the phenomenon, or the particular thing. Accordingly for both of these reasons it is impossible that matter can for itself express any Idea. This is confirmed a posteriori by the fact that it is impossible to have a perceptible idea of matter as such, but only an abstract conception; in the former, i.e., in perceptible ideas are exhibited only the forms and qualities of which matter is the supporter, and in all of which Ideas reveal themselves. This corresponds also with the fact, that casuality (the whole essence of matter) cannot for itself be presented perceptibly, but is merely a definite casual connection. On the other hand, every phenomenon of an Idea, because as such it has entered the form of the principle of sufficient reason, or the principium individuationis, must exhibit itself in matter, as one of its qualities. So far then matter is, as we have said, the connecting link between the Idea and the principium individuationis, which is the form of knowledge of the individual, or the principle of sufficient reason. Plato is therefore perfectly right in his enumeration, for after the Idea and the phenomenon, which include all other things in the world, he gives matter only, as a third thing which is different from both (Timaus, p. 345). The individual, as a phenomenon of the Idea, is always matter. Every quality of matter is also the phenomenon of an Idea, and as such it may always be an object of æsthetic contemplation, i.e., the Idea expressed in it may always be recognised. This holds good of even the most universal qualities of matter, without which it never appears, and which are the weakest objectivity of will. Such are gravity, cohesion, rigidity, fluidity, sensitiveness to light, and so forth.
If now we consider architecture simply as a fine art and apart from its application to useful ends, in which it serves the will and not pure knowledge, and therefore ceases to be art in our sense; we can assign to it no other aim than that of bringing to greater distinctness
