For reference only, I hope it will help you. On Practice was written by Mao Zedong in July 1937. Based on the relationship between cognition and practice, On Practice systematically expounds the main contents, essential characteristics and significance of Marxist epistemology, and adheres to and develops the dynamic and revolutionary theory of reflection. Mao Zedong expounded the following four basic questions in "On Practice": (1) The viewpoint of practice is the basic viewpoint of dialectical materialism epistemology. (2) the dialectical process of cognition, that is, the process of cognition from practice and the process from cognition to practice. (3) Criticize "rationalism" and "empiricism". (4) Transforming the Relationship between the Objective World and the Subjective World Mao Zedong concluded in "On Practice" that truth is discovered through practice, and truth is confirmed and developed through practice. From perceptual knowledge to rational knowledge, and from rational knowledge to guide revolutionary practice, transform the subjective world and the objective world. Practice, cognition, practice and cognition are endless, and the content of each cycle of practice and cognition has reached a higher level. This is the whole epistemology of dialectical materialism, and this is dialectical materialism's view of the unity of knowledge and action. In the past college entrance examination textbooks, most of us studied for exams. For a person without any social experience, learning these theories is tantamount to an armchair strategist. Even if you remember them firmly at that time, if you don't practice, you won't learn real knowledge, because you have no voice, and most of your knowledge and experience come from personal practice. Now think about the knowledge of the college entrance examination. How much do you remember? If I take the exam again now, can I still get the original score? So practice is very important. "Practice, understanding, re-practice, re-understanding, this form is endless, and the content of each cycle of practice and understanding is relatively advanced to a higher level. This is the whole epistemology of dialectical materialism, and this is dialectical materialism's view of unity of knowledge and action. " This is a correct view of practice. I believe that "consciously participating in social practice" is also a requirement for our young people and the best means for our progress. So from now on, we should make progress in practice. The language of this paper on Practice is not only straightforward and vivid, but also accurate. For papers, the accuracy of language is the first. Mao Zedong used ordinary words from beginning to end, but he accurately expressed the author's ideological connotation. For example, "a scholar who never leaves home and knows everything about what's going on in the world can only be empty talk in ancient times with underdeveloped technology." Although these words can be realized in modern times with advanced technology, it is the people who practice in the world who really know themselves. Those people gained knowledge in practice and reached the hands of a scholar through the exchange of words and technology. A scholar can know what is happening in the world indirectly. If you want to know something or something directly, only by personally participating in the struggle to change reality and the practice of something or something can you touch the phenomenon of that thing or something, and only by personally participating in the struggle to change reality can you expose the essence of that thing or something and understand them. " Concise and precise examples hit the nail on the head, which is the genius of Mao Zedong! "If you want to know the taste of pears, you have to change them yourself. If you want to know the composition and properties of atoms, you must carry out physical and chemical experiments to change the state of atoms. If you want to know the theory and method of revolution, you have to take part in it. All real knowledge comes from direct experience. But people cannot experience everything directly. In fact, most knowledge is indirect experience. This is all ancient and outland knowledge. " Practice, no matter what work, can not be separated from practice, practice makes true knowledge! Practice also requires us to have the unity of time and space, because different periods and places require us to practice differently. In the whole theory of practice, we can also see many concrete examples that conform to the historical background at that time. We also know that we should look at problems from the perspective of development, so we should carry out different practices in different periods and places. Only people's social practice is the standard for people to know the truth of the outside world. Comrade Mao Zedong gave a more profound and accurate explanation of this sentence: In the process of social practice, people have achieved the expected results in their thoughts, so their understanding has been confirmed. If they can't reach this point, they will fail in practice, learn from their failures, correct their thoughts and succeed. Many people always complain that there are too few opportunities. Opportunities are never scarce, but when opportunities come, we have no confidence and ability to seize them. Opportunities are reserved for those who are prepared. We should actively improve ourselves and actively understand all aspects of knowledge and experience, so that when the opportunity comes, we can seize the opportunity and create success. We should seize the opportunity to practice, to know, to practice, to know again, and to be prepared. Practice theory has far-reaching significance for guiding our various practical activities now and in the future. We should study it carefully, understand its thought and apply it to our practice, so that we can better participate in practice, succeed in practice and gain experience in practice.