"Every separate sector of artistic creation has its own basic rules . . . data which govern it. They are contained in the textbooks on these subjects. A professional knows the rules of the game as a matter of course so that he can achieve, in the upper strata above that, a high quality of art."

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The basis of artistic creation is not what is, but what might be; not the real, but the possible. Artists create according to the same principles as nature, but they apply them to individual entities, while nature, to use a Goethean expression, thinks nothing of individual things. She is always building and destroying, because she wants to achieve perfection, not in the individual thing, but in the whole.

— Rudolf Steiner