Sound Directing

William Shakespeare, Macbeth (1605), Act II, scene 3, line 86.

John Cage, "Communication", the third of the Composition as a Process lectures given in Darmstadt in 1958 and published in Silence. Many of Cage's works use sounds traditionally regarded as unmusical (radios not tuned to any particular station, for instance): he really did believe that the sound of a truck and the sounds made in a factory had just as much musical worth as the sounds made in a music school. There is also a suggestion expressed in the quote that in order to determine the artistic worth of something, it is necessary to examine the context in which it exists.

Hakuin Ekaku (1686-1769). The phrase is a Kōan, an irrational comment used in Zen Buddhism in order to assist practitioners in reaching enlightenment.