“Aiyyo; I heard your single, you better make a whole new song”

No. XI, Romance, st. 1.
Songs of Travel and Other Verses (1896)

Bass Generation

"Hey Jude" (1968)
Lyrics, The Beatles
Context: Hey Jude, don't make it bad
Take a sad song and make it better.
Remember to let her into your heart
Then you can start to make it better.

Fa-Fa-Fa-Fa-Fa (Sad Song), co-written with Steve Cropper.
Song lyrics, Complete & Unbelievable: The Otis Redding Dictionary of Soul (1966)

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.
Context: 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.

Title page poem
Underwoods (1887)

Source: How Can I Keep from Singing: Pete Seeger (1981), p. 119

David Profumo, "Bringing the House Down", (John Murray, 2006), serialised in the Daily Telegraph, 2 September 2006.
In her 10th Wedding Anniversary letter to her husband John Profumo, written in 1965, two years after the scandal in which his adultery was revealed.