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"Cage employed chance operations only in the ordering and coordination of musical events. The selection of materials, the planning of structure and the overall musical stance were still shaped by his stylistic predilections. What he had learned by using chance operations in a work like the Concerto was that, given a set of sounds and a structure built on lengths of time, any arrangement of the sounds and silences would be valid and interesting. Chance, by helping to avoid habitual modes of thinking, could in fact produce something fresher and more vital than that which the composer might have invented alone."

- Andrew Stiller