The basic meaning is "I've been thinking about it all the time, and I can't forget it for a day"

Used in sentences that express my feelings or instruct something particularly important.

Source: Shangshu Da Yu Mo

The original sentence is as follows:

Yu said, "My virtue is useless, but the people do not obey. Hao Tao has cultivated virtue, but virtue has fallen, and Li Min is pregnant with it. The emperor read it! Reading is here, explaining is here, saying is here, allowing is here, but the emperor reads merit. "

the emperor said, "Hao Tao, however, is a humble official, and he does nothing or does something right. As a scholar, you are clear about the five punishments to teach five religions. The period is to be treated, the sentence is not to be punished, and the Association for Democracy and People's Livelihood is in the middle, which is a merit. "

Vernacular translation:

Yu said: "My morality is not competent, and the people will not obey. Hao Tao diligently set up a moral policy, which can be applied to the people, and all the people miss him. Emperor should miss him! Hao Tao is the one who studied virtue, Hao Tao is the one who admired virtue, Hao Tao is the one who preached virtue, and Hao Tao is the one who sincerely promoted virtue. The emperor should deeply remember his achievements! "

Shun said, "Hao Tao! The subjects didn't commit political crimes because you were a noncommissioned officer, and you could understand the five punishments to assist the teaching of the five permanent members, which was suitable for the rule of law. Punishment is to achieve no punishment, and the people are in the middle. This is your credit, what a good job! "

Extended information:

Da Yu Mo comes from Shangshu, one of the Five Classics of Confucianism, and records the ancient historical materials of Da Yu, Bo Yi and Shun's political planning. Dayu was a courtier of Shun. He made great contributions to flood control, and later generations called him Dayu. Mo, mou. The first paragraph of this article narrates the political planning of Dayu, Bo Yi and Shun, so it is called Dayu Mo. This is one of Mei's Pseudo-Ancient Books.

Reference: Baidu Encyclopedia-Shangshu Dayu Mo.