Practice is to implement what you have learned. Only knowledge that is implemented down-to-earth is true knowledge. ?Pragmatism refers to focusing on seeking truth from facts and proceeding from reality in everything. From "The Doctrine of the Mean" "Study extensively, inquire deeply, think carefully, discern clearly, practice diligently".

It means that to be knowledgeable, you must inquire about knowledge in detail, understand it thoroughly, think carefully, distinguish clearly, and practice it practically. From the "Book of Rites of Xiao Dai" and "Book of Rites of Xiao Song".

Extended information:

Introduction to "The Doctrine of the Mean"

"The Doctrine of the Mean" is a moral philosophy monograph in ancient China that discusses the realm of life cultivation. It originally belonged to the "Book of Rites" "Chapter 31, one of the Confucian classics, is said to have been written by Zisi during the Warring States Period.

The content affirms that "moderate" is the highest standard of moral behavior, regards "sincerity" as the ontology of the world, believes that "sincerity" reaches the highest realm of life, and proposes "learn well and interrogate." , think carefully, discern clearly, and practice diligently" learning process and understanding method.

Scholars in the Song Dynasty extracted "The Doctrine of the Mean" from the "Book of Rites" and combined it with "The Great Learning", "The Analects of Confucius" and "Mencius" into the "Four Books". After the Song and Yuan Dynasties, it became an official school textbook and a required reading for imperial examinations, which had a great impact on ancient Chinese education and society.

The main commentaries include Cheng Hao's "The Doctrine of the Mean", Cheng Yi's "The Doctrine of the Doctrine", Zhu Xi's "The Doctrine of the Doctrine", Li Kuan's "The Doctrine of the Doctrine", Dai Zhen's "Supplementary Notes on the Doctrine of the Mean", and Kang Youwei's "The Doctrine of the Mean". "Notes on the Doctrine of the Mean", Ma Qichang's "Exegesis of the Doctrine of the Mean" and Hu Huaichen's "A Brief Theory of the Doctrine of the Mean", etc.