greed and desire in human nature can never be satisfied. This is just a simple sentence with no source. It belongs to the psychological category.

People's greed is endless, and they always want to get better, so they create. Greed is good or bad, depending on how people treat it.

If you want to maintain mental health, you can't let all kinds of desires grow indefinitely.

Human nature is the ugliest, greedy, selfish and arrogant. Everything we do is for our own interests, and we pretend to be ourselves only for survival. It is estimated that the ugliest soul on earth is human beings.

the greedy desire of human nature can never be satisfied. The excitement I want to live when I am dull, and the excitement I want to live when I am dull. I'm not Spider-Man. I can't give you two different lives. I love you, but I have never told you that time is fleeting. I only exist in you.

Extended information:

Du Mu's "Crossing the Qing Palace in China":

Looking back at Chang 'an, there are piles of embroideries, and thousands of doors are opened at the top of the mountain.

When riding a princess in the world of mortals and laughing, no one knew it was litchi.

When Du Mu-lu arrived in Chang 'an via Huaqing Palace, he felt that Tang Xuanzong and Yang Guifei had committed a dissolute and wrong country.

the quatrains of crossing the Qing Palace intercepted this historical fact, attacked the feudal rulers' arrogance, extravagance and ignorance, satirized the present with history, and warned the monarch.