If you want to know the height of the sky and the thickness of the earth, you must climb the mountain and face the deep stream. It is impossible to understand the situation of heaven and earth without boarding it. If people want to acquire real knowledge, they must personally participate in social practice.
The purpose of learning theory lies in practice. People will lose the ability to practice if they overemphasize theory and despise practice. Theory is empty and can only be implemented through practice. Only by putting it into action and practicing it seriously can the acquired knowledge not become an empty dogmatic theory.
"I think it's an armchair strategist. I don't know if it should be done." This is what Lu You said. But some people like to talk on paper, and as a result, they hurt others and themselves. Zhao Kuo is a good example.
During the Warring States Period, Zhao Kuo, the son of Zhao She, a famous soldier of the State of Zhao, was familiar with the art of war when he was young and was good at talking about soldiers. Even his father can't beat him. Later, the kings of Zhao and Qin conspired to ask him to replace Lian Po as the commander-in-chief of Zhao. Zhao Kuo is a man who lacks practical experience and only talks about the art of war. After he arrived in Changping, he rebelled against Lian Po's actions, replaced the general's assistant, changed the military system, and made the officers and men of the whole army abandon Germany and have low morale. 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. Later, he was shot by Qin Jun, and all his 400,000 people were captured. Zhao perished.
Although victory or defeat is a common occurrence among military strategists, the war under the guidance of the theory summarized from practice is the war with a good chance of winning. For example, although Lian Po is a veteran of Zhao, his theoretical knowledge may not be as rich as Zhao Kuo's, but Lian Po has rich practical experience in attacking cities and plundering land, and mainly relies on the accumulation of practice, rather than the theoretical knowledge memorized from the art books. What Zhao Kuo lacks is practice. When it comes to theory, P is eloquent, but in actual combat, most of them are people like Zhao Kuo who lack struggle practice.
On the contrary, those who combine practice with theory will often make great achievements as long as they make unremitting efforts.
Once a doctor conducted a very famous experiment. The success of this experiment indicates that smallpox, a disease that has plagued mankind for more than 0/000 years and claimed countless lives, has been subdued, and this doctor is the world-famous Edward Chennault. After graduating from college, he went to the countryside to do practical work. In the past 20 years, while practicing medicine, he often went to the dairy farm to carefully observe how cows got cowpox, how cowpox infected people, and what symptoms people had after being infected with cowpox. He inoculated the animals with vaccinia first, then smallpox, and the experiment was successful. Then I did an experiment on a little boy, and the result was safe and sound. Since then, people have finally found a way to prevent smallpox.
As the saying goes, it takes a long time to practice a sword after ten years. In the long years of nearly 20 years, after repeated experimental research, practice and unremitting efforts, Chen Na finally succeeded in smallpox vaccination, which was an epoch-making experiment.
Practice is the foundation of theory, the starting point and destination of theory, and it plays a decisive role in theory, which is beyond doubt. However, we should not despise theory and lead to pragmatism.
Therefore, practice and theory are closely linked, and only by practicing in person can we get a truly shining theory.