The snail crawled forward with a heavy hard shell. It moves forward slowly step by step. It needs to carry such a hard and heavy shell forward, but it never wants to put it down. Snails are so persistent, let alone us. People who want to commit suicide are not as good as such weak snails. So when we encounter setbacks, we need perseverance. Perseverance is the cornerstone of a person's success. Madame Curie made great contributions to the scientific community all her life. When she first started studying radioactive elements, there were many problems that bothered her: the laboratory was too simple, and others discouraged her from giving up the research, but she didn't give up. She gave herself confidence and courage, and it was inevitable to take detours in the research process. But even if she got nothing, she never gave up and kept on. When the first radium crystallized, when she went to the podium to announce her great discovery to the audience, when the audience was shocked by her discovery, she succeeded. It is perseverance that brings her closer and closer to success, and firmness in the face of setbacks gives her strength, allowing her to succeed step by step with persistence. Perseverance makes a person from impossible to possible. Master Mei Lanfang liked opera since he was a child, but many people thought that he was congenitally deficient and had no connection with opera, but he never gave up. Congenital deficiency starts from the day after tomorrow. When others were resting, he kept practicing and heard the cynicism of others. He just thought it was an expression, and finally his congenital deficiency was made up by his perseverance. Who would have thought that Mei Lanfang, who was thought by many people to be impossible to become attached to opera in the next few decades, became one. Perseverance, from impossible to possible, perseverance in the face of setbacks, let him have dreams, and finally changed the congenital deficiency and turned the impossible into possible. Xiang Yu, the overlord of Chu, was ambitious when he was a child, but unfortunately he didn't have perseverance, so he didn't persist, which eventually led to the tragedy of Wujiang River committing suicide. When Xiang Yu was a child, he loved reading Sun Tzu's Art of War and asked his uncle to teach him the art of war. However, he soon became too boring to learn it, so he gave up and took his uncle to teach him to dance swords. But he soon gave up, so he only learned some fur, and finally he could not compete with Liu Bang. If he can bear hardships. When we encounter setbacks, it is an encouragement and spur to think about the persistence of our ancestors. Sometimes we are just snails. In the face of difficulties and hardships, we need to persevere and go to the end.