"Preserving heaven's principles and destroying human desires" belongs to the cultivation of mind and nature.
"Heavenly principles" are justice, great kindness, and human kindness. "Human desire" is selfishness, a small evil, and human selfishness. "Keeping the principles of nature" means preserving kindness, pursuing the principles of nature, and following the path. "Destroying human desires" means eliminating evil, self-denial, self-reflection, and self-cultivation.
To put it simply, "preserving heaven's principles" means doing good, and "eliminating human desires" means getting rid of evil. A popular understanding of Zhu Xi's "preserving natural principles and destroying human desires" is to prevent the excessive expansion of personal desires and pursue and maintain the harmony and beauty of society, morality, political style and folk customs.
To sum up, "preserving heaven's principles and destroying human desires" actually has certain positive significance and cannot be completely denied. (The above comes from Baidu)
Because I saw some of the above introductions to "preserve the principles of nature and destroy human desires.", Coupled with my own superficial understanding, I came up with the idea of writing a story.
Gu Mingcheng is a person who understands too much the idea of "preserving heaven's principles and destroying human desires". Everything about him is serious and deviates from human nature. He believes that natural principles and human desires are in opposition, and only by eliminating human desires can natural principles be preserved.
And in this way, he met a fox demon-Feng Xi. Grow in nature, get the essence of heaven and earth and transform into human beings. His character is lively and unrestrained; his thoughts are straightforward and he pursues freedom. The first time he met Gu Mingcheng, he fell in love with her at first sight and transformed into a woman to express his love (Feng Xi is a male fox, but he turned into a woman for Gu Mingcheng. Although his appearance changed into a woman, his biological sex is still male.). Gu Mingcheng naturally would not answer. But no matter how strong the restraint is, it can't stop a pure heartbeat of emotion. In short, etiquette is no match for true love. Therefore, during this period of pursuit, Feng Xi will gradually allow Gu Mingcheng to return to his natural nature. (This is roughly the case, details may change.)
It goes something like this. Although I have such an idea, due to my limited ability, I cannot write it well. I apologize if I disappoint everyone watching.
Intention: Confinement and Breakthrough