"Even in the limitations of the individual voices, in their relative incompleteness, there are advantages.* The necessity for utilizing them within the narrow range of their effectiveness demands characteristic usage and treatment consistent with the material. Thus the pupil learns by this simple example to heed an important principle of handicraft: to make characteristic use of the strengths and shortcomings of the material at hand.
"*I am taking such pains with these things ... to establish explicitly that these principles are not derived from aesthetics but from practical considerations. If what is known as aesthetics does in fact contain much that is merely practical handling of the material, and if what is known as symmetry is perhaps often not much more than an organization of the material that reveals a sensible regard for its properties, yet I consider it worthwhile to set down these observations. For the conditions of practicality can change, if we take a different view of the material and if the purpose changes."
--Arnold Schoenberg, Harmonielehre