For me, a painting must be a pleasant thing, joyous and pretty - yes, pretty. There are too many unpleasant things in life for us to fabricate still more.
Notes from Wikiquote
As quoted in Luncheon of the Boating Party (2007) by Susan Vreeland
Variants
/ To my mind, a picture should be something pleasant, cheerful, and pretty, yes pretty! There are too many unpleasant things in life as it is without creating still more of them.