The scorpion and the charity

An oriental teacher who saw as a scorpion was suffocating, he decided to extract it of the water, but when he did it, the scorpion punctured it. For the reaction to the pain, the teacher gave up it and the animal fell to the water and again was suffocating. The teacher tried to extract it again, and again the animal punctured it. Someone who had observed everything, approached the teacher and said to him: " Excuse, but you are stubborn does not understand that whenever it tries to extract it of the water will puncture it?.
The teacher answered: The nature of the scorpion is to sting and it is not going to change mine, which is to help ". And then being served a leaf the teacher extracted to the little animal of the water and saved the life.