"An old woman was walking along a path and came across a poisonous snake, that had been beaten and wounded. She took the snake home and over many months nurtured it back to health.
One day when the woman was feeding the snake, it turned around and bit her, repeatedly. As the woman lay dying, she asked the snake why it would do such a thing after she had taken care of it. The snake replied, "Lady, you knew I was a snake when you helped me."
-Author Unknown