Which book is it from?

The word comes from The Mean: "Don't be invisible, don't be insignificant, so a gentleman is cautious and independent." In today's words, even when you are alone, you should be cautious, consciously abide by laws and ethics, and don't do bad things because others are not present or paying attention. This is a realm or method of moral cultivation advocated by Confucianism, which is called "cautious independence is the way to enter morality". Zhu, a scholar in the Southern Song Dynasty, explained the word: "A gentleman is cautious independence, which is not particularly obvious. Although he is subtle, he is often cautious in places that people don't know, small and big; Obviously, this is the case, and so is the subtle influence. What is coarse and fine is called' sincerity', and what is not sloppy is called' sincerity'. " (Zhuzi School) A story about Shen Du: Yang Zhen is golden at dusk;

When General Deng Zhi heard that Yang was really a smart man, he sent someone to recruit him, recommended him as a scholar and promoted him many times. He is an official of Jingzhou and the governor of Donglai. He passed Changyi on his way to the county seat. Wang Mi, the champion of Jingzhou, whom he recommended before, visited Yang Zhen when he was appointed as the magistrate of Changyi County. In the evening, Wang Mi came to Yang Zhen with ten catties of silver. Yang Zhen said, "I know you, but you don't know me. Why? " Wang Mi said, "Nobody knows at night." Yang Zhen said, "God knows, God knows, I know, you know. No one knows how to say it! " Wang Mi went out in shame (with money).

Twilight in Yang Zhen tells the story of Yang Zhen's refusal to accept bribes at dusk. The beauty of this article lies in the word "dusk". In the dead of night, without the knowledge of the third party, Yang Zhen, as the boss and teacher of Wang Mi, resolutely refused to pay a large sum of money and solemnly declared. This is something that nature, jurisprudence, man and reason cannot tolerate. His spirit of "cautious independence" is commendable and can be called a model of all previous dynasties. Although the story is small, it is of great educational significance. A person, from small to large, is serving the officials and the people, day and night, has nothing to do with anyone, can be strict with himself, is not greedy, refuses gifts and bribes, and his noble character and moral norms are well-known. This is a very good ideological education material, so as to expand students' thinking, guide them to understand the educational significance contained in Yang Zhen's words, and learn to be a noble person.