In the ancient Yin and Zhou Dynasties, there was already a saying of "destiny". The rulers at that time claimed to be "ordered by heaven" and described their thoughts as providence and orders. China's Confucianism retained the idea of "destiny". For example, Confucius, the founder of the Confucian school, once said, "Fear destiny" and "Know destiny at fifty". "Destiny" has always been an important content of Confucianism.
The Doctrine of the Mean is an article on Confucian human nature cultivation. Originally the 31st Book of Rites, it is said that it was written by Zi Si, and it is a classic work of Confucianism. Respected by Cheng Hao and Cheng Yi in the Northern Song Dynasty, Zhu in the Southern Song Dynasty wrote Notes on the Doctrine of the Mean, which was finally called "Four Books" together with Daxue, Analects of Confucius and Mencius. After the Song and Yuan Dynasties, The Doctrine of the Mean became an official textbook and a must-read in the imperial examination, which had a great influence on ancient education.