Tranquility and Zhiyuan is a famous sentence by (Liu An in the early Western Han Dynasty)

This sentence first came from "Huainanzi: Main Techniques" written by Liu An in the early Western Han Dynasty, and Zhuge Liang's "Jiezi" Book" is also cited. Zhuge Liang said a sentence: "Without indifference, there is no clear ambition; without tranquility, there is no far-reaching goal." It comes from the "Book of Commandments" written by Zhuge Liang to his 8-year-old son Zhuge Zhan when he was 54 years old. This is not only a summary of Zhuge Liang's life experience, but also a request for his son. It shows his teachings and unlimited expectations for his son.