Once upon a time there was a wicked wizard. One night the wizard visited a city and stole a thousand tongues from its sleeping inhabitants. He took these tongues and cast a spell on them. The spell meant that these tongues could only say bad things about people. Then the wizard returned the tongues to their owners, who suspected nothing. In very little time, that city was filled with the sound of people saying bad things about each other,"Yes, he did that, she did the other, boy, was that guy a bore, and the other guy was really clumsy…"Soon everyone was angry with everyone else, and this brought the wicked wizard no end of satisfaction. On seeing all this, the good wizard decided to intervene with his own powers. He cast a spell on the ears of the city dwellers. Under this spell, whenever the ears heard people criticising others, they would close up tightly, so that nothing could be heard. And so started the great and terrible battle between tongues and ears. The one endlessly criticising, the other blocking all this out. Who won the battle? Well, with the passing of time, the tongues started to feel completely useless. Why talk if no one was listening? Being tongues, they liked to be heard, so they gradually started to change the kind of things they would say. When the tongues realised that saying good things about people meant they would be listened to once again, they were filled with joy, and forgot forever the spell they had been under. Even to this day, the wicked wizard continues casting spells on tongues all over the world. But thanks to the good wizard now everyone knows that to put an end to gossiping, all one has to do is pay no attention to it. 
Constantly criticizing others, instead of seeing the good in them, is nothing to be proud of. 