Once there were three famous artists in a city. They were known far and wide for their skill as artists. Once a competition was held and a prize was declared for the best artist. Three artists competed for the prize. One of the three artists painted a flower. The flower was so beautiful and natural that a bee came and sat on the flower to gather honey. The second artist painted a bunch of grapes. They looked so real that an ox tried to eat them. The spectators saw these two pictures and praised them.
The third artist painted an curtain. It was so real and life-like that the judge himself tried to raise the curtain, without realizing that it was a picture.
The first painting had deceived only an insect the second had misled an animal while the third had deceived the judge himself. Naturally the prize went to the third painting.
Moral : Art lies in concealing art.