If you strengthen the foundation and economize, if you cultivate and exercise, you can't be poor if you cultivate without strengthening the foundation and economize. When you are prepared and moving, you can't get sick; If you cultivate without two things, heaven can't be a disaster. Therefore, floods and droughts can't make it thirsty, cold and summer can't make it sick, and the coat monster can't make it fierce. (On Heaven)

Appreciating the relationship between heaven and man is an important proposition of China's ancient philosophy. In the pre-Qin period, people thought that heaven, like man, was conscious and dominated the fate of mankind. In Xunzi's view, heaven is no longer a personality god, but a natural existence independent of human society. However, human beings can't wait for the gift of heaven and earth and passively conform to nature. "Praise it from heaven, and use it to control the destiny?" ("Tian Lun") Strengthen agricultural production and live frugally. Even God can't make him poor. Well-fed and able to move with the times, then god can't make him sick; Follow the road of propriety and righteousness wholeheartedly, and God can't make him suffer.

at the beginning of Tian Lun, Xunzi put forward that "Heaven is always there, not for Yao's survival, not for Jie's death". The operation of heaven and earth follows a fixed objective law, and it will not be good because of Yao's benevolence and righteousness, nor will it be a disaster because of Jie's tyranny. During the reign of Emperor Shun, there was a flood that lasted for 14 years. Shun sent Dayu to control the water, and used the natural law of water to dredge the river, and finally subdued the flood. It can be seen that as long as people actively play their subjective initiative while conforming to the natural law, even the disaster from heaven will not damage the reputation of managing the world; Most of the time, the Qin dynasty was in good weather, with abundant crops and abundant grain reserves. Many large granaries were established throughout the country, and even the grain stored in these granaries was still used when Emperor Gaozu arrived, but Qin II died. It can be seen that there is no necessary connection between the good and bad luck of human society and heaven and earth.

Xunzi objected to the one-to-one correspondence between some natural phenomena such as meteors, eclipses and earthquakes and the rise and fall of human society, and thought that such collateral events were superstitious and undesirable. Heaven has a vocation, and people have personnel. "The stars are spinning, the sun and the moon are passing by, the four times are imperial, the yin and yang are flourishing, and the wind and rain are generous. Everything has its own harmony to live, and each has its own support to become" ("The Theory of Heaven"), which is the bounden duty; "Strengthen the foundation and economize, and when you are prepared and moving, you should cultivate without two things." This is personnel. Xunzi declared in "The Theory of Heaven": "Therefore, if you are clear about the distinction between heaven and man, you can be said to be the most human." The universe naturally has its own laws of operation, and human society has followed its own objective laws since its birth, and people should perform their duties and do their best. The monarch governs the country with benevolence and justice, and supports the people, while the people do their duty: farmers adapt to the weather and work hard; Craftsmen study skills and strive for perfection; Scholars assisted the monarch and made great efforts to govern; Businessmen abide by the right path and value righteousness over profit. Then even droughts and floods cannot make this country poor; Even if diseases and plagues occur alternately in cold and summer, they will not spread and cause people to suffer from illness; Even if there is a strange disaster, it will not put the country and the people in danger. It can be seen that Xunzi's words still shine with the brilliance of thought.