What do you mean by heaven, earth, mystery and yellow?

The phrase "heaven and earth are mysterious and yellow" comes from the Book of Changes. sky

The Book of Changes says, "Metaphysics refers to Tao and Metaphysics refers to vessels". Before the universe was born, it was in a state of chaos. Modern physics is called ultra-dense infinite collapse particles before the Big Bang, and China culture is called Taiji. 65.438+0.5 billion years ago, this ultra-dense particle suddenly exploded, forming the present material universe, in which tangible substances condensed into stars, namely the earth; Invisible space expands to form space, which is the sky. The Book of Changes says: Those who are clear ascend to heaven, while those who are turbid descend to earth. Isn't it vivid and concrete? But this is the physical world, the material world. In Yijing culture, it belongs to the metaphysical "tool world", that is, the material world. Metaphysics is a world of immaterial Tao, which is beyond our existing intelligence, so Confucius said "stay outside Liuhe". "Yes" means to admit that it does exist, and "No matter" means not to discuss it for the time being, because we don't have enough wisdom, so why bother quarreling if we say it! To tell the truth to people with high wisdom, it is heaven in metaphysics and earth in physics. People who are not wise enough can only say simple words: space is the sky and the earth is the earth. It's all the words of heaven and earth. Deep people have a deep understanding, while shallow people have a shallow view, and each has its own place.

black

In color, it refers to the color of dark blue close to black, which is called Xuan. In a sense, it refers to the sublime and inscrutable, and is called metaphysics. The color of the sky visible to the naked eye is blue, how can it be said to be black? The blue of the sky is due to the diffraction of light. The red, orange, yellow and green light in the sun has a long wavelength and can be diffracted and emitted to the ground. Blue, indigo and purple have shorter wavelengths and can only be emitted back and forth between various impurities in the air, so the sky looks blue. But now the astronauts in space look very dark, and only the stars give off a little light. It's really dark, so the color of Tian Xuan is right. In addition, the sky is sublime, just as Laozi said, the metaphysical body of the sky is mysterious and unfathomable, which is beyond our existing wisdom. This is a metaphysical paradise, so it is called Tian Xuan.

glutinous rehmannia

It also has two meanings. Our culture in China, especially the traditional culture, refers to the culture before the pre-Qin period, that is, the culture of Xia, Shang and Zhou Dynasties, especially the culture of Zhou Dynasty. In ancient times, Xia, Shang and Zhou established their countries and capitals in the Yellow River valley. If the scope of China traditional culture is further narrowed, it should be said that it is the culture of the Yellow River Basin. The Yellow River is the mother river, which originates from Kunlun Mountain (about the ancient Zonglie Basin), gathers in Xinghai, crosses the Rocky Mountain, flows down from the northwest plateau through nine turns and eighteen bends, and at the same time brings down loess, forming an impact plain. The color of water is yellow, the color of soil is yellow, and crops such as millet and millet are yellow, so it is called Rehmannia glutinosa. Another meaning is that the celestial bodies in the universe, including the earth, are all products of the Big Bang, and they are all hot substances in the initial state. The earth condenses its temperature in the magma of the core, and it is constantly replenished with the help of the sun. Life can only exist if there is temperature. In chromatographic analysis, dark black is a cool color and yellow is a warm color. Rehmannia also praised the warm earth for its long-term nourishing and nurturing function, so China called the earth "mother". The sky is high and the tunnel is deep, and yellow also represents the depth of the tunnel. Superstitious people say, "When people die, they will go back to the grave. Crossing the Naihe Bridge is the way to the grave." . Although the words are not credible, their meaning is nothing more than another deep world unknown to the living. It can be seen that it is not easy to understand the word "heaven and earth are mysterious and yellow".