The Dog And The Shadow

A dog was carrying a piece of meat when he came across a plank of wood acting as a bridge over a brook. As he crossed he caught sight of the reflection of what he thought was a dog carrying another piece of meet. Being a little greedy, he snapped at the reflected piece of meat and in doing so, dropped his piece into the water and lost it.

Moral: Beware lest you lose the substance by grasping at the shadow.