Its content affirms that "the golden mean" is the highest standard of moral behavior, regards "sincerity" as the noumenon of the world, thinks that "sincerity" reaches the highest realm of life, and puts forward the learning process and cognitive methods of "erudition, questioning, deliberation, discernment and perseverance".
The theoretical basis of the doctrine of the mean in expanding data is the unity of man and nature. Usually, people talk about the unity of heaven and man mainly from philosophy, mostly from Mencius. "People do their best to know their nature; If you know its nature, you will know its nature "("Dedicated "), while ignoring the harmony between man and nature in the golden mean, and even ignoring the true meaning of harmony between man and nature.
The essence of the unity of heaven and man is to be united in sincerity and goodness, to achieve "harmony, the position of heaven and the cultivation of all things" and "only the sincerity of the world, to do our best." If you can do your best, you can do your best; If you can make good use of human nature, you can make good use of things; If you can make the best use of it, you can praise the teaching of heaven and earth; If you can praise the cultivation of heaven and earth, you can participate in it.