Once there was a boy with a temper. His father gave him a bag of nails and told him that every time he lost his temper, he should hammer a nail into the backyard fence. On the first day, the boy hammered 37 nails. Gradually, the number of nails hammered each day decreased, as he found it easier to control his temper than to hammer the nails. One day, the boy no longer lost his patience and told his father about it. His father then said, "From now on, every time you manage to control your temper, pull out one nail." As days passed, the boy eventually told his father that he had pulled out all the nails.
The father took him by the hand to the backyard and said, "You have done well, my son, but look at the holes in the fence. This fence will never be the same as it was before. The words you speak in anger are like these nails—they leave scars. If you stab someone with a knife, no matter how many times you say sorry, the wound will always remain. The pain caused by words is as unbearable as physical pain."
People often cause lasting damage to one another due to grudges that cannot be let go. If we can start with ourselves and treat others with tolerance, we will surely see unexpected positive results. By opening a window for others, we are also allowing ourselves to see a more complete sky.