A willful man will have his way to his own hurt.
The Serpent and the Eagle
A SERPENT and an Eagle were struggling with each other in deadly conflict. The Serpent had the advantage, and was about to strangle the bird. A countryman saw them, and running up, loosed the coil of the Serpent and let the Eagle go free. The Serpent, irritated at the escape of his prey, injected his poison into the drinking horn of the countryman. The rustic, ignorant of his danger, was about to drink, when the Eagle struck his hand with his wing, and, seizing the drinking horn in his talons, carried it aloft.
The Crow and the Pitcher
A CROW perishing with thirst saw a pitcher, and hoping to find water, flew to it with delight. When he reached it, he discovered to his grief that it contained so little water that he could not possibly get at it. He tried everything he could think of to reach the water, but all his efforts were in vain. At last he collected as many stones as he could carry and dropped them one by one with his beak into the pitcher, until he brought the water within his reach and thus saved his life.
Necessity is the mother of invention.