Listen to one of Aesop's Fables, The Fox and the Grapes or The Grapes are Sour.

This fox has a longing for grapes, 

He jumps; but the bunch still escapes, 

So he goes away sour, 

And it is said to this hour, 

Declares that he has no taste for grapes.

"It is easy to despise, what cannot be obtained."