Aesop - The Fox and the Stork

The Fox invited the Stork to dinner, and provided nothing but a soup, in a wide, shallow dish. This he could lap up with ease; but the Stork, who could but just dip in the point of his bill, was not a bit better. A few days after, he returned the compliment, and invited the Fox; but suffered nothing to be brought to the table but some minced meat in a glass jar, the neck of which was so deep and so narrow, that, though the Stork with his long bill could eat very well, all that the Fox could do was to lick the brims. The Fox was heartily vexed, but owned that he had been used as he deserved.

Those who practice cunning must expect to suffer by it

Aesop - The Wolves and the Sheep

"Why should there always be this implacable warfare between us?" said the Wolves to the Sheep. "Those evil-disposed Dogs have much to answer for. They always bark whenever we approach you, and attack us before we have done any harm. If you would only dismiss them from your heels,there might soon be treaties of peace between us." The sheep, poor silly creatures! were easily beguiled, and dismissed the Dogs. TheWolves destroyed the unguarded flock at their pleasure.

Change not friends for foes

Aesop - The Great and the Little Fishes

A Fisherman was drawing up a net which he had cast into the sea, full of all sorts of fish. The Little Fish escaped through the meshes of the net, and got back into the deep, but the Great Fish were all caught and hauled into the ship.

Our insignificance is often the cause of our safety