There is a story about two friends. who were walking through the desert. During some point they had an argument and one friend slapped the other one in the face. The one who got slapped was hurt, but without saying anything. She bent down and wrote in the sand: TODAY MY BEST FRIEND SLAPPED ME.
They keep on walking until they found an abandoned oasis and they decided to take a bath. The one who had slapped got stuck in the mine and begun to drown but the friend saved her. After she recovered. She wrote on a stone: TODAY MY BEST FRIEND SAVE MY LIFE. The friend who had slapped and then later saved her friend asked her,
"After I hurt you, you wrote in the sand and now you write on a stone. Why the difference?"
The friend replied.
"When someone hurt us we should write it down in sand where wind of forgiveness can erase it away. But, when someone do something good for us we must engraved it in a stone where no wind can never erase it..
Credit: My best friend, Panadol_Bad.