Two men are walking on a deserted road. Suddenly, they have a fierce discussion and one man that cannot control himself has been slapped his friend. The other was painful but did not say anything. He only wrote in the sand: "Today my best friend slapped me in the face."

They keep on going, to a river, they stopped and took a bathed. Unfortunately the other was cramped and drowning, lucky his friend saved him in time. After calming down, he wrote on the rock: "Today my best friend saved my life."

His friend feel surprised: "What is that ? when I slapped you, you wrote in the sand, and but now you write on a stone?"

Smiling, he replied: "When a friend make us hurts, let write something in the sand, the wind will blow them away with forgiveness ... And when there's something more important , we have to engrave on the  rock , it means that we  keep it in our heart, where no wind can erase them ... ".

Learn to write..... On the sand and on the rock ...