Appartently he didn't have too much to say about art. This first one I cannot verify, and only seen it attributed on one webpage.
“Art is when you do something just cockeyed from what is the right way to do it, then it's art.”
~ Will Rogers
“Diplomacy is the art of saying 'Nice doggie' until you can find a rock.”
“Advertising is the art of convincing people to spend money they don't have for something they don't need.”