The Donkey and The Tiger

 "The grass is blue!" shouted the donkey.

"No, the grass is green," replied the tiger.

"It is not! It's blue! It's obviously blue! I can't believe you could think it's green!"

"Nevertheless, the grass is green," replied the tiger.

And so the argument went on, until the donkey demanded they take the matter up with the Lion, the Judge and King of the Jungle. 

Brought before the Lion, the donkey pleaded his case. "Oh great and wise Lion, is the grass not, in fact, blue?"

"As you say," said the Lion.

"The tiger contradicts and embarrasses me! Will you not punish him for his disrespect?"

"Very well," replied the Lion. "The tiger will spend a week in silence."

"Yes! Finally! Thank you!" And the donkey went noisily on his way.

"You will accept your punishment?" asked the Lion.

"I will," replied the tiger. "But I must ask why I am being punished, as the grass really is green."

"Your punishment has nothing to do with the color of the grass," said the Lion.

"Then why?"

"Because it is not proper for an intelligent, reasonable creature like you to allow yourself to be caught up in the arguments of a jackass, and less so that you would then involve me in the problem as well."

The Lion's voice then softened. "There are some creatures who will not respond to logic and reason. They do not seek for the truth; they only seek their own satisfaction. You will never convince them with facts, because their convictions are independent of reality. You cannot win an argument with them, because they are incapable of admitting there is anything they do not know.

"In the face of such creatures, the only effective response is silence. Take a week and remind yourself what that sounds like. Your life will be happier, and your mind will be at peace."

The tiger bowed his head in respect. "You are wise, my King. Thank you."