The Fox and the Grapes

The Fables of Phædrus
Urged by hunger, a Fox, leaping with all her might, tried to reach a cluster of Grapes upon a lofty vine. When she found she could not reach them, she left them, saying: “They are not ripe yet; I don’t like to eat them while sour.”
Those who disparage what they cannot perform, ought to apply this lesson to themselves.