This sentence was said by Zhang Zai, a scientist in the Northern Song Dynasty. Regarding reading methods, Zhang Zai emphasized that the main organ of human thinking is the "heart". In order to think carefully and observe carefully, you must keep your mind always present. If you have doubts about it, you will gain new knowledge and know new principles. Therefore, he advocates the method of learning and the spirit of seeking knowledge (quotations from Zhang Zi).
The main points of Zhang Zai's discussion on the method of reading and seeking knowledge are summarized as follows: intention, familiarity, careful thinking, perseverance, confusion, innovation, lack of help, short time, theory, development, implementation and implementation. Zhang Zai's exposition on reading and seeking knowledge has been repeatedly evaluated by later scholars. For example, Zhu's "Recent Thoughts Volume III" said: "This theory is very appropriate, if you don't go to the old place to see new ideas."
Extended data:
As an outstanding and successful great educator, Zhang Zai has a unique and profound exposition on teaching principles and educational laws. Zhang Zai advocates that in the actual teaching process, teachers should be persuasive, inspire and guide students' knowledge awareness and interest in learning. At the same time, we should teach students in accordance with their aptitude and meet the different needs of all kinds of students, so as to achieve the teaching goal.
Zhang Zai believes that the ultimate goal of education is to make people change their temperament and become sages. Education must focus on discipline and benefit all beings. Educating students is useful to the world and people. Therefore, it is particularly emphasized that "learning is valuable and useful" and "applying what you have learned", and it is opposed to learning without using it. This is the outstanding feature and advantage of Guan Xue's style of study. Zhang Zai believes that the study of saints is to eliminate the worries of the country and the nation, and it is useless for saints not to worry about the people of the country.