An Arab legend says that two friends were traveling through the desert and at one point of the trip they got a fight. One of the friends slapped the other in the face.
The other, offended, with nothing to say, wrote in the sand:
TODAY MY BEST FRIEND SLAPPED ME IN THE FACE.
Went ahead and reached an oasis where they decided to bathe.
The one who had been slapped and hurt started drowning, being saved by his friend.
Upon recovery took a stylus and wrote on a stone:
TODAY MY BEST FRIEND SAVED MY LIFE.
Intrigued, the friend asked:
Why, after I hurt you, you wrote in the sand and now you write on a stone?
Smiling, the other friend replied:
When a great friend offends us, we write in the sand where the wind of forgetfulness and forgiveness are responsible for deleting it off and, on the other hand when we pass something great, we burn the stone of the memory of the heart where no wind will ever delete it.