One happy man said of his secret: 'I wrote the following paragraph on the mirror in the bathroom and read it every morning when I shave' I was gloomy because I lost a pair of shoes until I was on the street I saw someone missing two legs'." ​​ A pilot who drifted alone in the Pacific for more than 20 days before returning to land was asked what was his biggest lesson from that adventure. He said without hesitation: "The biggest lesson I learned from that experience is that as long as there is food to eat and water to drink, you should stop complaining about life." ​​ People will always encounter various misfortunes in their life, but happy people don't keep these in their hearts, they have no worries. So, what is happiness? To be happy is to cherish what you have and be content.

​​ And what is the complaint? ​​ Like a cigarette butt bursting a balloon, deflating others and yourself. ​​ In fact, it is human nature to complain. Shouldn't others be allowed to talk about distress? However, complaining is inadvisable: when you complain, you are pouring water into your shoes, making it harder to walk. Difficulty is one thing, complaining is another. The person who complains thinks that he is the strong one, but the society is too unfair, like people all over the world to destroy his success, which may turn the cause and effect of things upside down. ​​

Complaining is not the same as admitting your failures. Those who dare to admit defeat will win the respect of others. It is obviously a failure, but it does not admit failure. It is obviously injured, but it dresses up the wound like a flower. People originally sympathized with the weak, but because of the rapid decline in popularity of complaining, they could not get sympathy from others. After complaining, the person who complained not only did not feel relieved, but got worse. The stones in his arms not only did not decrease, but instead increased. As the saying goes, letting go is happiness. This also includes letting go of complaining, because it is something heavy and worthless in the heart. ​​ People are attracted to those optimistic people because of their detachment. Optimistic people possess the confidence, courage and faith that life requires. While they benefit themselves, they also infect others. People who associate with optimism, including open-minded, tenacious, and composed people, will feel that difficulties are never an obstacle to life, but a foil to courage. When you are with optimistic people, you will be optimistic. ​​ Complaining about the loss of not only courage, but also friends. Everyone is afraid of complaining people, afraid of being infected. Without courage and friends, life becomes difficult, so those who complain keep complaining. They don't know that there are many simple ways to set things right in life, and shutting up is one of the true meanings. ​​ Many people have complained about the difficulty of the situation, and they kept silent when they found that it was of no avail. Complaining is the equivalent of walking barefoot on a gravel road, while optimism is a pair of sturdy boots.