The basic moral principles such as monarch, minister, father, son, benevolence, righteousness, courtesy, happiness and human relations all belong to the category of metaphysics. These principles have not changed. Literature refers to Confucian classics such as poetry, books, history, biography, zi and Ji, and is the carrier to record the thoughts of sages for future generations to learn from. The so-called use means that these moral principles and ideas can be "moistened by taking measures", that is, how to use Confucianism to establish social and political order and apply it to the world.
Hu Yuan was a famous educator and a pioneer of Taoism in the Northern Song Dynasty. The influence of his education on Taoism is mainly manifested in his "learning from time to time".