The relation between the æsthetic activity and the practical moment of the production of the physical objects of art may be regarded under the aspect of the relation between art and technique. The only legitimate meaning of the word technique is that of a body of naturalistic knowledge in the service of the practical activity of the artist. In this sense we can conceive of a great artist who is a poor technician, as in the case of a painter who should use Colours subject to rapid change and deterioration, a musician who should be a bad singer or pianist, a poet who should not be able to recite his own poetry. But in the common language of critics, we mean by technique something quite different--in painting what we call drawing or composition, in music, harmony or orchestration, in poetry, metre and construction. Now it is quite clear that we cannot conceive of a great painter who could not draw, a great musician unable to harmonize or to orchestrate, a great poet whose lines are defective. What we here isolate as the technical handling of an artistic subject is but the process of æsthetic creation itself, the succession and progression of intuitions in the artist's mind; using the naturalistic or psychological method, we abstract certain moments of the creative process, and we attribute a reality to such abstractions. We talk of the technique of a poem or of a painting as being something that has been superadded to the original intuition; we see the poet or the artist engaged in learning the technique of his art; we see him correcting or modifying his original expression according to certain technical standards. But what we call the technique of a poem or of a painting is that particular poem or painting in its concreteness; and no poet or artist can learn a technique except by re-creating in his own spirit the work of the great masters, his technical education being but one with his æsthetic education; and finally, the process of correction or modification is merely a stage of the expressive process itself: no poet can correct a line in his poem, no painter change a line or a shade in his picture, if the internal image has not first spontaneously undergone such corrections and changes in his mind.