The Dog and the Shadow[Aesop's Fables]

It happened that a Dog had got a piece of meat and was carrying it
home in his mouth to eat it in peace. Now on his way home he had to
cross a plank lying across a running brook. As he crossed, he looked
down and saw his own shadow reflected in the water beneath. Thinking
it was another dog with another piece of meat, he made up his mind to
have that also. So he made a snap at the shadow in the water, but as he
opened his mouth the piece of meat fell out, dropped into the water and
was never seen more.
Beware lest you lose the substance by grasping at the shadow.