The story goes that two friends were walking through the desert. During some point of the journey they had an argument, and one friend slapped the other one in the face.
The one who got slapped felt hurt, but without saying anything, wrote in the sand: "Today my best friend slapped me in the face."
They kept on walking until they found an oasis, where they decided to take a bath. The one who had been slapped got stuck in the mire and started drowning, but the friend saved him. 
After he recovered from the near drowning, he wrote on a stone: "Today my best friend saved my life."
The friend who had slapped and saved his best friend asked him, "After I hurt you, you wrote in the sand and now you write on a stone. Why?"
The other friend replied: "When someone hurts us we should write it down in sand where winds of forgiveness can erase it away. But when someone does something good for us, we must engrave it in stone where no wind can ever erase it."
相关单词：oasis
oasis解释：n.（沙漠中的）绿洲，宜人的地方
oasis例句：
They stopped for the night at an oasis.他们在沙漠中的绿洲停下来过夜。
The town was an oasis of prosperity in a desert of poverty.该镇是贫穷荒漠中的一块繁荣的“绿洲”。
相关单词：decided
decided解释：adj.决定了的，坚决的；明显的，明确的
decided例句：
This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
相关单词：mire
mire解释：n.泥沼，泥泞；v.使...陷于泥泞，使...陷入困境
mire例句：
I don't want my son's good name dragged through the mire.我不想使我儿子的名誉扫地。
He has rescued me from the mire of misery.他把我从苦海里救了出来。
相关单词：erase
erase解释：v.擦掉；消除某事物的痕迹
erase例句：
He tried to erase the idea from his mind.他试图从头脑中抹掉这个想法。
Please erase my name from the list.请把我的名字从名单上擦去。
相关单词：engrave
engrave解释：vt.（在...上）雕刻，使铭记，使牢记
engrave例句：
It is difficult to engrave in marble.在大理石上雕刻是困难的。
The jeweller will engrave the inside of the ring with her name.珠宝匠将在戒指的内表面上刻上她的名字。
