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.
Learn to write your hurts in the sand and to carve your benefits in stone.