(Sorry for the clicks--the vinyl was scratched...)

"Responsibility is taken through general rules for driving one note, or group of notes, from another. When we introduced aleatoric elements and then pure chance into our dealings with sound, so that material was no longer chosen but rather provided externally, we forgot this fundamental fact of musical language, that each element depends on every other one. The derivation of one motive or interval from another, or of the vertical dimension from the horizontal, our processes that seem to be indispensable if coherence is to be achieved, if language is to be necessary."

Music Lessons: The Collège de France Lectures

https://www.google.com/books/edition/Music_Lessons/CssHwwEACAAJ?hl=en