2,400,000 Americans play the accordion - hopefully not at the same time.
Inside of a Pepsi cap

A poem is never finished, only abandoned.
Paul Valery (1871-1945) 

Abstract art: a product of the untalented sold by the unprincipled to the utterly bewildered.
Al Capp 

Anything that is too stupid to be spoken is sung.
Voltaire (1694-1778) 

Art consists of limitation. The most beautiful part of every picture is the frame.
G. K. Chesterton 

Assassins!
Arturo Toscanini (1867-1957)  , to his orchestra

But that's what being an artist is - feeling crummy before everyone else feels crummy.
The New Yorker

Cute little babies that fall out of swings - These are a few of my favourite things.
Oscar Hammerstein  , working lyric for a piece from "The Sound of Music"

Give me a museum and I'll fill it.
Pablo Picasso (1881-1973) 

Hell is a half-filled auditorium.
Robert Frost (1874-1963)