This story tells of two friends who were walking through the desert. At some point in the journey 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, 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 the friend recovered from nearly 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, but now you write on a stone... why?"
The other friend replied: "When someone hurts us, we should write it in sand... where the winds of forgiveness can erase it from view. But, when someone does something good for us, we should engrave it in stone... where no wind can ever remove it."
SO, WRITE YOUR HURTS IN THE SAND, AND FORGET THEM.
BUT CARVE YOUR BENEFITS IN STONE, TO BE REMEMBERED.