1. In order to succeed in the scientific experiment, Edison did not study hard all day, but practiced day and night. In order to practice, sulfuric acid almost ruined his eyes, and the powerful current almost killed him. But he still made unremitting efforts for the cause of science and ultimately benefited mankind.
Regardless of their lives, the Curies insisted on fighting in strong radioactive chemicals. In order to extract polonium, they made great efforts and practiced day and night. After the successful extraction, they gave up the patent right and huge reward, and then marched to a new scientific peak-discovered a new substance-radium. They devoted all their energy to finding radium.
For four years, they have been heating and stirring more than 20 kilograms of uranium ore residue every day, extracting radium layer by layer, and have been working in a strong radiation environment, during which the hardships almost killed them. After 1350 days and nights of hard work, they finally extracted 1g (one in eight million) of radium from 8 tons of pitchblende residue, which drew a big exclamation mark for four years of hard work in science.
3. After observing and practicing celestial bodies, Copernicus and Galileo challenged the authoritative and absurd geocentric theory, but they angered the Pope and gave their lives. But the hardships do not stop scientists from continuing to practice.
4. During the Warring States Period, Zhao Kuo, the son of Zhao She, a famous soldier of Zhao, was familiar with the art of war when he was young, and was good at talking about the way of military strategists. Even his father can't beat him. Later, the king of Qin, one of the princes of Zhao, did the opposite and asked him to replace Lian Po as General Zhao. Zhao Kuo is a man who lacks practical experience and only knows the art of war. In Changping, we reversed Lian Po's action, changed the lieutenant, changed the military system, and the morale of the whole army was low.
He changed Lian Po's strategic defense, actively planned a strategic offensive, and attempted to win it in one fell swoop and recapture Shangdang. In the battle of Changping, Zhao Kuo only knew how to fight according to the art of war, but he didn't know how to respond flexibly. After that, he was shot by Qin Jun, and all his 400,000 people were captured. Zhao perished. Although it is common for military strategists to lose and win, the knowledge-guided war summed up in practice has a great chance of winning.
5. Li Shizhen was a famous physician in ancient China. He pays attention to practice, investigation and verification. He personally collected and tried medicines, and spent nearly 40 years compiling the famous Compendium of Materia Medica. In order to write this book, he visited Qian Shan Wanshui, went through all the hardships and devoted his life!
His story tells us that "theory comes from practice." Practice is the only criterion for testing truth. Only practice can make a breakthrough and achieve something!