The reasons why it is not recommended to read Guiguzi are as follows:

Firstly: The book says that you must penetrate into the hearts of others, master the laws of other people's psychological activities, and only by seeing through this person can you achieve great things. It makes sense, but it is not practical in modern times. Second: Guiguzi said: "Those who obey the world's major events will succeed, and those who go against will perish." In modern terms, it makes people feel a bit obedient. Third: Guiguzi said: "To gain one's emotions is to control one's skills." Although it makes sense, it is a typical conspiracy theory.

Fourth: Guiguzi said: "Don't judge people by their temperament." This sounds controversial. When looking at people, temperament is sometimes very important. Confucius said in "The Analects" that a person should be elegant and simple, but the book "Guiguzi" said that judging people does not depend on temperament. The two typical meanings are very controversial, but Confucius' theory is not too controversial. Confucius once said that temperament is a person's cultivation, but Guiguzi said that it doesn't depend on temperament. No wonder many people have ambiguity about Guiguzi's words.

Character introduction:

Guiguzi, Wang family, named Xu, also known as Zen, his date of birth and death is unknown, also known as Wangxu, Wangchan, Wangli, Taoist name Guiguzi. A native of the Chu state during the Spring and Autumn Period and the Warring States Period, his ancestral home was in the south of Chaoge (now Qi County). A legendary figure from the Warring States Period. The famous strategist, the originator of political strategists, the master of military art, and the founder of the political strategists of hundreds of schools of thought. According to legend, the four moles on his forehead turned into ghosts. He is proficient in hundreds of schools of knowledge. Because he lives in seclusion in Guigu, Yunmeng Mountain, he calls himself Mr. Guigu.

He often goes to the mountains to meditate. He is endowed by God with wisdom that reaches all the heavens and the earth, and is well versed in the laws of nature and the mysteries of heaven. Guiguzi was revered as a "sage seeker" by later generations. In the history of culture, Guiguzi was an academic master alongside Confucius and Laozi. He secluded himself from the outside world and put the world in a chess game. His disciples became generals and prime ministers, influencing the survival of countries and driving the direction of history. His major works include "Guiguzi", "The Seven Arts of Yin Fu" and other important works. His works were called "the forbidden fruit of wisdom, the most extraordinary book" by later generations, and were listed as banned books in the past dynasties.

Reference for the above content: Baidu Encyclopedia-Guiguzi