Testimony of friendship( a wonderful story)

It is the story of two friends who walked in the desert. At one point, they disputed and one of the two gave a slap to the other.This one, sore but without saying anything, wrote in the sand:
    "Today my best friend gave me a slap."
They continued to walk and then found an oasis, where they decided to bathe. But the one who had been slapped missed drowning and was rescued by his friend. When he was picked, he wrote on a stone:
    "Today my best friend saved my life."
   The one who gave the slap and had saved his friend asked him:
"When I hurt you you have written on sand, and now you've written on the stone. Why? "
   The other friend replied:
    "When someone hurts us, we must write in the sand, where winds of forgiveness can erase it.
But when someone is doing something good for us we have to burn it in stone where no wind can erase it. "
Learn to write your wounds in the sand and burn your joys in stone.

My freind sent this story to me, I agree with what he ask me to do, I mean that we must forget when someone hurts us and always remember when someone helps us, but sometimes it's so difficult to forget what someone 'specilly a friend- did do to us.

So, what do you think? Do you always try to forgive to your friends ?

Have a nice day all