One winter a Farmer found a Snake stiff and frozen with cold. He had compassion on it, and taking it up, placed it inside his coat where it was warm.
The Snake was quickly revived by the warmth, and resuming its natural instincts, bit the Farmer, giving him a mortal wound.
“Oh,” cried the Farmer with his last breath, “I should have known better than to pity a scoundrel.”
Moral: The greatest kindness will not bind the ungrateful.