Current Musicology devoted an issue to composers writing about their own music in 2000, and I was one of the composers who wrote an article. All musical excerpts are copyright © by CF Peters.
Apologies in advance for the pretension dripping from the first three paragraphs. Here it go:
N.B. The article ends with a preposition. You might be able to find an old live recording of the piece of you click on the "i" in "this".