When I was in art college, I would be painting, and I would create something on a canvas that was actually quite attractive. But if I got frightened and tried to protect that, that canvas would die.
When the painting is hanging on your wall for a long time, you don't notice it. You get tired of it, even if it's a Picasso. When the next generation inherits the painting, they sell it. I don't want to be sold.
The trend in some of the contemporary movements in art, but by no means all, seems to deny this ideal and to me appears to lead to a purely decorative conception of painting.