The "Book of Changes" says: One yin and one yang are called Tao. All things in the world are naturally conceived.

The flowers are best when they are not in full bloom. Once the flowers are in full bloom, they are not far from falling to the ground. It is best if the moon is not full circle. Once the moon is full circle, it will slowly become a waning moon.

For us ordinary people, if the flowers are not fully blooming or the moon is not fully round, it is a flaw, that is, it is not perfect. Little do they know that pursuing perfection and reaching the extreme is the best way to ruin a person.

Professor Zeng Shiqiang said: "When you are going smoothly, you must be careful. When anything goes to the extreme, it will definitely turn around."

When you go for a long time, you must be careful. Time always feels bad and there are many difficulties ahead. It feels like dark clouds are blocking the sun and there is no hope. You must hold on because every day in the future will be infinitely closer to the sunshine. Just as there is no way out of mountains and rivers, there is another village with dark willows and bright flowers, and there is rebirth in the dead end.

Throughout thousands of years of history, things have been divided and reunited. In prosperous and troubled times, dynasties are always changing in a cycle of prosperity and decline, decline and prosperity, and the cycle repeats.

There are several dynasties that clearly prove that things will inevitably turn to the extreme, such as the rule of Zhenguan, the prosperous age of Kaiyuan, the prosperous age of Kangxi and Qianlong... They all experienced prosperity and decline, and changed dynasties.

Currently, we humans are increasingly plundering the earth's resources, and the earth's resources are being consumed uncontrollably. By then, the earth will be unable to bear human consumption, which may lead to the end of human civilization.

If you think this is alarmist, please take a look at the black storm in the United States, the tsunami in Chile, the Tangshan earthquake, the melting of the North and South polar glaciers caused by the greenhouse effect, the Australian bushfires, the African plague, and the new coronavirus in 2020 ....They are all telling us that human beings are destroying nature to a catastrophic extent.

There is only one earth, and humans and all things on the earth need to rely on the earth to continue to thrive. If we cannot balance yin and yang and pursue perfection blindly, we humans are likely to destroy ourselves!

Everything must be done in moderation.

Since ancient times, the most taboo in life is to be full, half poor, half rich, and half at ease.

Half life, half day, half opportunity, half taking, half giving up, half doing good.

Half deaf, half dumb and half confused, half wise, half stupid and half sage.

Half of my life depends on me, and the other half depends on nature.