The Book of Commandments was written in the 12th year of Jianxing in Shu Han Dynasty (234). It was a letter written by Zhuge Liang to his eight-year-old son Zhuge Zhan in his later years. Zhuge Liang dedicated his life to the country and died. He worked day and night for the national cause of Shu and Han and neglected to educate his son personally, so he wrote this letter to warn Zhuge Zhan.
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Zhuge Liang's article has profound connotations. As young people, we should not only have lofty ideals and ambitions, but also have concrete and feasible measures to realize them and the perseverance to overcome difficulties and eliminate interference. Otherwise, the ideal may become a fantasy, or even unconsciously lower itself to the point of mediocrity and vulgarity.
This letter from Zhuge Liang is about this truth. If a person is ambitious and determined, coupled with careful thinking and then put into action, he may succeed in the increasingly fierce social competition. On the contrary, it is doomed to fail. Zeng Guofan also taught his children to be "ambitious, knowledgeable and persistent" in family training.