There were once two friends walking on a road trip in the desert.

On the way, they disagreed on a subject and started to argue with each other.

One of them slapped the other out of anger. The friend who had been slapped got upset.

However, without saying anything, he wrote this on the sand 'Today my best friend slapped me in the face.'

They continued their trip together until they arrived at an oasis. They decided to stop there for a while to rest near the pond.

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Suddenly the person; who had been slapped; slipped and fell into the water. He was about to drown when his friend came to help him and save him.

After being saved from drowning, he carved into a rock this sentence.

'Today my best friend saved my life.'

His friend asked him surprisingly: "After I annoyed you with that slap, you wrote that sentence on the sand but now you carve this sentence into a stone rock?"

The other friend smiled and said "When someone annoys us, we must write it on the sand so that the winds of forgiveness can remove it but when someone does us a favor, we must crave it into the stone so that no wind can remove it from our memory.