The Dog That Dropped The Substance For The Shadow

[1]

This world is full of shadow-chasers,
Most easily deceived.
Should I enumerate these racers,
I should not be believed.
I send them all to Aesop's dog,
Which, crossing water on a log,
Espied the meat he bore, below;
To seize its image, let it go;
Plunged in; to reach the shore was glad,
With neither what he hoped, nor what he'd had.