Along the lines of David Foster Wallace (at least they seem connected to me):
The world is filled with people who are no longer needed -- and who try to make slaves of all of us -- and they have their music and we have ours.
— From Pastures of Plenty: A Self-Portrait, p. 106
And this one, which I just like:
This song is Copyrighted in U.S., under Seal of Copyright #154085, for a period of 28 years, and anybody caught singin it without our permission, will be mighty good friends of ours, cause we don't give a darn. Publish it. Write it. Sing it. Swing to it. Yodel it. We wrote it, that's all we wanted to do.
— Message on mimeographed copies of lyrics distributed to fans in the 1930s, as quoted by Pete Seeger in an NPR interview "Pete Seeger remembers Woody" (1996)
Oh, and one more. A long one. The first part is well-known, but the end is the best.
I hate a song that makes you think that you are not any good. I hate a song that makes you think that you are just born to lose. Bound to lose. No good to nobody. No good for nothing. Because you are too old or too young or too fat or too slim too ugly or too this or too that. Songs that run you down or poke fun at you on account of your bad luck or hard traveling. … I am out to fight those songs to my very last breath of air and my last drop of blood.
I am out to sing songs that will prove to you that this is your world and that if it has hit you pretty hard and knocked you for a dozen loops, no matter what color, what size you are, how you are built, I am out to sing the songs that make you take pride in yourself and in your work.
And the songs that I sing are made up for the most part by all sorts of folks just about like you. I could hire out to the other side, the big money side, and get several dollars every week just to quit singing my own kind of songs and to sing the kind that knock you down still farther and the ones that poke fun at you even more and the ones that make you think you've not any sense at all. But I decided a long time ago that I'd starve to death before I'd sing any such songs as that. The radio waves and your movies and your jukeboxes and your songbooks are already loaded down and running over with such no good songs as that anyhow.
Statement quoted in Prophet Singer: The Voice And Vision of Woody Guthrie (2007) by Mark Allan Jackson. There are a few slight variants of this statement, which seems to have originated in a performance monologue.