"It is not hard to compose but it is wonderfully hard to let the superfluous notes fall under the table. . . So many melodies fly about, one must be careful not to tread on them."

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Listen widely to remove your doubts and be careful when speaking about the rest and your mistakes will be few. See much and get rid of what is dangerous and be careful in acting on the rest and your causes for regret will be few. Speaking without fault, acting without causing regret: 'upgrading' consists in this.

— Confucius