Everyone has a "key to happiness" in their hearts, but we often unknowingly hand it over to others.

A woman complained: "I am very unhappy because my husband is often away from home on business trips." She put the key to happiness in the hands of the husband.

A mother said: "My child is disobedient and makes me angry!" She handed the key to the child.

The man said, "The boss doesn't appreciate me, so I'm in a low mood!" The key to happiness was stuffed into the boss's hand.

The mother-in-law said, "My daughter-in-law is not filial, I am suffering!"

The young man walked out of the stationery store and said, "The boss has a bad service attitude and made me angry!"

These people have all made the same decision, which is to let others control his mood.

A well-known writer and a friend bought newspapers at a newsstand. The friend politely said "thank you" to the newspaper vendor, but the newspaper vendor kept his face cold and didn't say a word.

"This guy has a bad attitude, doesn't he?" the writer asked as they moved on. "He's like this every night," said the friend.

"Then why are you still so polite to him?" the writer asked him.

The friend replied, "Why should I let him decide my actions?"

A mature person holds the key to his own happiness, he does not expect others to make him happy, but can bring happiness and happiness to others.