I ching explained the laws of nature.

"born at four seasons, everything is born on the ground." The sun and the moon cycle back and forth, forming a natural law of alternating day and night and four seasons cycle on the earth. Everything on the earth follows this natural cycle, life and death, rise and fall and * * *. Although everything has its own life cycle, the length of life cycle is different, and the form and movement mode of life are also different, but they basically follow the trajectory of the four natural seasons, that is, "spring birth, long summer, autumn maturity and winter death", which will go through these four life stages, updated every day, alternated month by month and reincarnated year by year.

The ancestors of the Chinese nation realized this natural law thousands of years ago, so they realized the theory of Zhouyi, which is a collection of wisdom. It comprehends the whole process of the origin, change and development of all things in the universe from the natural laws of the sun, moon, yin and yang, and four seasons, and abstracts it into yin and yang theory and gossip theory, so as to deduce and compare the whole life course of all things in the universe. It is pointed out that the law of yin and yang movement and the law of four seasons cycle are the common laws of all things in the universe. The so-called "yin and yang, the principle of the world"; At four o'clock, the world's great diameter is also. "That is to say, everything in the universe has two characteristics of Yin and Yang, and develops and evolves under the interaction and mutual promotion of these two characteristics. Its evolution and development go through four stages, namely "beginning, growth, climax and death", just like the laws of the four natural seasons, "born in spring, growing in summer, dying in Qiu Cheng and winter". This is a simple and profound natural law of the universe, which is shown to human beings and everything by the alternation of the sun and the moon and the seasons. This is heaven, heaven rules, heaven principles and heaven rules abstracted from the laws of motion of celestial bodies in the universe. There is an old saying: "Spring grows in summer, autumn grows in winter, and winter in Tibet. ".So Zhouyi originated from the four seasons of the sun and the moon, and also talked about the laws of the four seasons of the sun and the moon, but later abstracted and mystified these.

1, Yin and Yang are actually abstractions of cold, heat and cold. Yin and Yang are two core concepts in the general introduction of Zhouyi. This word is used to symbolize and explain the essential characteristics of the universe and classify it. This is very wise. "One yin and one yang is the Tao". Neijing says: "Yin and Yang are the way of heaven and earth, the discipline of all things, the changing parents, the foundation of life and death, and the home of all gods". Everything in nature is due to time and place, yin or yang, and it is still transforming and complementing each other because of time and place. This is the law of the change of yin and yang. And this yin and yang is the sun and the moon at the beginning. The so-called "Yi" is the sun and the moon. The sun and the moon alternate and go round and round, resulting in changes in cold and heat, cold and heat, and then changes in the four seasons, and then natural things. Guan Zi said, "The way of Yang begins with warmth and the heat of midsummer; The movement of Yin began in Qing Dynasty and flourished in the cold. Spring, summer, autumn and winter are different. " In the Book of Changes, it is said that "it is very easy to have two instruments,,,,,". These two instruments originally represented midnight, noon and day, summer solstice and winter solstice respectively.

Science tells us that the expansion and destruction of the universe is actually the transformation of cold and hot energy. The life course of the universe is an evolution process from extremely hot to extremely cold, and the life of all things in the universe is a change process of cold and hot energy. Temperature is a sign of measuring cold and hot energy. Therefore, the concept of yin and yang in Zhouyi is consistent with the cold and hot energy of the universe from the beginning, so the Zhouyi touched the beginning of the universe from the beginning. Therefore, the fantasy of Zhouyi has become so great, magical and inscrutable.

2. Gossip is the natural law of spring, summer, autumn and winter. Eight diagrams is one of the most important circulation theories in Zhouyi. How did the gossip theory come about? It evolved from yin and yang. The Book of Changes says: "Tai Chi is easy, that is, two instruments are born, two instruments are born with four elephants, and four elephants are born with eight diagrams." Cold and summer produce four elephants, four elephants are four seasons, and four seasons produce gossip. Therefore, this sentence clearly states the relationship between the four seasons of Yin and Yang, and also shows that gossip comes from the cycle of the four seasons, that is, the four seasons are divided into eight seasons, namely "beginning of spring, Spring Equinox, Long Summer, Summer Solstice, beginning of autumn, Spring Equinox, beginning of winter and Winter Solstice". Later, the 24 solar terms were divided into three parts of eight seasons, which separated the turning points of the four seasons. So gossip is actually the natural law of the four seasons. It's just that Fuxi used the words "Gan, Hui, Li, Zhen, Xun, Kan, Yin and Kun" to represent the four seasons and eight periods for the sake of being more natural, so the gossip theory was abstracted, which was born out of the four seasons and eight periods and became a highly abstract and generalized speculative theory. At the same time, it has become an unfathomable metaphysical theory. But anyone who has seen the famous "River Map" in Zhouyi knows that the four natural seasons of spring, summer, autumn and winter are still indispensable time periods for gossip.

3. The five elements are the forms of everything in the natural four-season cycle. The theory of five elements is originally two different theoretical theories from Zhouyi. Later, in the Warring States period, the two theories gradually merged into one, forming the theory of Yin-Yang and Five Elements. The five elements are said to be an important part of Zhouyi, which is used to explain the origin and development of everything in the universe. "The sky has four seasons and time-space cycles, and the earth has various changes." The theory of five elements has three meanings: first, everything in the universe consists of five substances: gold, wood, water, fire and earth; Second, these five natural substances move and transform with each other; Third, the changing forms of all things in nature are basically these five forms. The changes of the five elements can not be separated from the natural four seasons or time and space, while the Zhouyi talks about the natural four seasons or time and space, lacking material content, so these two theories are just complementary and naturally integrated, so the Neijing says: "Therefore, the four seasons of Yin and Yang are the foundation of all things."

Five lines of gossip of Yin and Yang in the theory of Zhouyi is actually an abstract summary of the cycle of time and space, the morphological changes of the universe and their relationship, which is used to predict the future of the universe. It is clearly written in the Book of Changes: "The ancients worshipped the world, looked up at the sky, looked down at the earth, observed the culture of birds and beasts and the suitability of the earth, and took all the distances, so they started gossip to understand the virtues of the gods and the feelings of all things." This passage has made it very clear that the Book of Changes is abstract, general and theoretical. Just like the great scientist Newton, he realized and abstracted the great theory of "gravity" from the phenomenon that apples fell on trees in orchards. The Book of Changes is the same. It is also learned from the sun, the moon, the four seasons and the five elements. There is no mystery, just as Confucius said, "Simplify the complexity and the world is reasonable."

The Book of Changes is a theory really invented by thinkers. Unfortunately, it did not become the source of the development of ancient science in China, but became the originator of witchcraft such as divination, reincarnation of fate, fantasy and sophistry. It is understandable that the ancients mystified and witchcraft Zhouyi, because science was not developed at that time. It is understandable that ordinary people today regard Zhouyi as unfathomable, because after all, ordinary people still like to learn today's scientific knowledge, but if today's experts and scholars make Zhouyi so unfathomable and mysterious, it is purely a trick of eating, drinking and cheating.