A mother said, "My child is disobedient, which makes me very angry!" " "She put the key to happiness in the child's hand.
A shop assistant said, "The boss doesn't appreciate me, so I'm depressed." The key is stuffed into the boss's hand again.
These people all made the same decision, that is, let others control their emotions.
In fact, in life, each of us has a "key to happiness" in our hearts, but we often give it to others unconsciously.