Source: Confucius "The Analects of Confucius for Politics": Confucius said: "Reviewing the past and learning new things can be a teacher."

Interpretation: Confucius said: "Reviewing old knowledge can lead to new experiences and discoveries, and you can become a teacher."

Precautions:

So, old knowledge.

New, newly acquired knowledge.

Appreciate:

"Make the past serve the present" is one of Confucius' great theoretical contributions to China's pedagogy, which embodies the relationship between learning and innovation. It is of great value and far-reaching influence to review what you have learned and gain new gains. People's new knowledge, new thinking, new achievements and new ideas are often developed on the basis of what they have learned in the past.