"If you are not indifferent, you will have no ambition. If you are not quiet, you will be far away." From the Book of Commandments written by Zhuge Liang to his 8-year-old son Zhuge Zhan at the age of 54. This is written by Zhuge Liang. This couplet reflects Zhuge Liang's philosophical thinking on life. He believes that a person must be indifferent to desire to have a clear ambition, and must be lonely and quiet to reach a far-reaching realm. The language is simple and profound, full of Taoist philosophy.