As long as people are confident in themselves and have confidence in themselves, they can overcome difficulties and achieve success. This was proved by the German psychiatric expert Lindemann through personal experiments. Lindemann believes that as long as a person has confidence in himself, he can maintain mental and physical health. At that time, the whole country of Germany was paying attention to the tragic adventure of crossing the Atlantic Ocean in a single boat. More than a hundred brave men had failed in the boat one after another, and no one survived. Lindemann concluded that these victims were not defeated physically in the first place, but mainly died of mental breakdown, panic and despair. In order to verify his point of view, he conducted the experiment himself despite the objections of his relatives and friends. In July 1900, Lindemann sailed a small boat alone into the rough Atlantic Ocean. He was conducting a psychological experiment that had never happened before in history, and the price he was prepared to pay was his own life. During the voyage, Dr. Lindemann encountered unimaginable difficulties and was on the verge of death many times. He even had hallucinations before his eyes, his motor sense was also in a state of numbness, and sometimes he felt really desperate. But as soon as this thought arises, he immediately blames himself loudly: Coward, do you want to repeat the same mistakes and be buried here? No, I will definitely succeed! Finally, he successfully crossed the Atlantic Ocean.