Chapter 16 Yellow Emperor’s Classic

The following passage offers a profound yet concise map of the relationship between Heaven, Earth, and Man, revealing how the movement of Qi unfolds through the cycles of the year. At first glance, it appears to describe seasonal change, but upon closer study it becomes clear that it is outlining a complete model of transformation. One that underpins the foundations of Chinese Medicine.

In this chapter, the shifting qualities of Qi are not presented as abstract theory, but as living processes expressed through nature and mirrored within the human body. The rise and decline of Yang, the growth and storage of Yin, and their dynamic interaction are traced across the months, linking cosmological principles directly to physiology.

By examining these correspondences, we are invited to see the human being not as separate from nature, but as an expression of it. The movements of the organs, the rhythms of health and disease, and even the principles of diagnosis all emerge from this unified field of transformation.

To study this text, then, is not only to understand seasonal cycles, but to deepen one’s perception of the Dao as it manifests in both the world and within ourselves.

Here is the text in its entirety, I will then reorganized it to illustrate the structure used. The ancient Chinese used this format often because it helped in remembering.

Huang Di asked: The essentials of diagnosis, what are they like?

Qi Bo, In the first month and in the second month the qi of heaven begins to spread. The qi of earth begins to be effused, the qi of man is in the liver.

In the third month and in the fourth month , the qi of heaven spreads properly, the qi of earth is effused firmly, the qi of man is in the spleen.

In the fifth month and in the sixth month, the qi of heaven is abundant, the qi of earth has moved upward, the qi of man is in the head.

In the seventh month and in the eighth month, the yin qi begins to kill, the qi of man is in the lung.

In the ninth month and in the tenth month, the yin qi begins to freeze, the qi of the earth begins to be closed in, the qi of man is in the heart.

In the eleventh month and in the twelfth month, the freezing is repetitive, the qi of the earth is enclosed, the qi of man is in the kidneys.

This text represents many different concepts in Chinese Medicine. Understanding each one brings a deeper understanding of Chinese Medicine.

The most obvious concept is the relationship of Yang Qi to the seasons. Understanding this is based on the three entities of Heaven, Earth, and Man. To understand this we must go back to the beginning. The birth of Yang and Yin Qi can be defined using trigrams found in the I Ching.

In the Pre-Heaven organizing of the trigrams found in the I Ching Heaven is placed in the South and Earth in the North. The trigram of Qian Heaven represents the transformational and warming Qi of Yang. The trigram of Kun Earth represents the form and nourishing Qi of Yin.

When the Qian Heaven and Kun Earth trigrams interact the Post-Heaven trigrams are born.

After the interaction the Qian Heaven trigram is replaced by the trigram of Li Fire. The Kun Earth trigram is replaced with the Water trigram.

This is why we see the Heaven, Earth, and Man format is this text. Heaven represents utmost Yang, and Fire. Earth represents utmost Yin and Water. When they interact they give birth to the myriad of things. This is a symbolic ways of saying that all things are the product of the transformation of Yang and Yin, including man.

Man is the product of the Fire and Water, Heaven and Earth, Yang and Yin Qi. We are intimately tied to nature and our own Yang and Yin energies follow the same transformations of the season in the course of a year, but also during the day.

Using the concepts of Heaven, Earth, and Man to describe this transformation teaches us how to live according to the Dao. In chapter 5 of the Yellow Emperors Classic there is a short description of the transformations of Yang qi throughout the year.

The Yellow Emperors Classic chapter 5

Hence, the accumulation of yang, that is heaven.

The accumulation of yin, that is earth.

Yin is tranquillity, yang that is agitation.

Yang gives life, yin stimulates growth.

Yang kills, yin stores.

Yang transforms qi, yin completes physical appearance.

Heaven is Yang and Yin is Earth. This is symbolized by the trigrams of Qian Heaven and Kun Earth.

Together they comprise the transforming action of Yang and the physical form of yin. This process proceeds according to the cycle of Yang giving life, and Yin growing, Yang declining and Yin storing.

This cycle plays out in the seasons of the year and in the time periods of a day.

In this text we have a more detailed description. In chapter 5 the periods of the year are divided into two yang seasons of spring and summer, and two yin seasons of autumn and winter. Now there are six periods, each consisting of two months.

Heaven

The qi of heaven begins to spread, the qi of heaven spreads properly, the qi of heaven is abundant, the yin qi begins to kill, the yin qi begins to freeze, the freezing is repetitive.

This is a description of the Heavenly Yang and its rise and emission and then decline. This process is one of beginning to grow, spreading, abundance, declining, and entering storage.

The text of yin qi begins to kill refers to the decline of Yang which causes a decline of Yin growing.

Earth

The qi of earth begins to be effused, the qi of earth is effused firmly, the qi of earth has moved upward, the yin qi begins to kill, the qi of the earth begins to be closed in, the qi of the earth is enclosed.

This describes the path of Yin and its interaction with the Yang qi.

Yin becomes effused by Yang Qi, now firmly effused, it moves upwards towards Heaven by the action of transforming, Yin stops growing, Yin begins to store Yang and this continues.

Connection

The text, the qi of earth has moved upward, is referring to the connection between things on Earth and in Heaven.

What is connected with the Heavens will ascend upwards. Earth contains Water and Water is a combination of Water and Yang.

The true original nature of Fire in the Heavens is Yin, therefore it has a connection with Earth. The true original nature of Water on Earth is Yang, therefore it has a connection with the Heavens.

The trigram of Fire contains a Yin line and this is its original nature. The trigram of Water contains a Yang line and this is its original nature.

This is a symbolic description of the transformation of Yang and Yin Qi. In nature the sun shines on all the water, which warms and becomes vapor which rises to the sky to become rain.

Man

In the first month and in the second month the qi of man is in the liver.

In the third month and in the fourth month the qi of man is in the spleen*.

In the fifth month and in the sixth month the qi of man is in the head.

In the seventh month and in the eighth month, the qi of man is in the lung.

In the ninth month and in the tenth month the qi of man is in the heart.

In the eleventh month and in the twelfth month, the qi of man is in the kidneys.

Each of the organs belongs to a season. In the same way it is associated with the directions.

Spring, liver, East.

Earth, spleen, center.

Summer, head and heart, South.

Autumn, lung, West.

Winter, kidneys, North.

*The spleen belonging to the third and fourth month is interesting.

The spleen does not belong to any season, but to the last eighteen days of each season. Which is another ways of saying that without Earth there would be no life. In associating the third and fourth month to the Spleen is a way of expressing the role of Earth and the Spleen and how it depends on the rising and transforming of Yang qi.

Wang Bing had this to say about the Spleen.

The qi of heaven spreads properly because the yang qi abounds in brilliance. The earth qi is effused firmly, causing the myriad beings to blossom and to bear fruit. However, at the conclusion of this season, the soil rules. The qi of soil is generated in times associated with the celestial stem bing*. Hence the qi of man is in the spleen.

*Bing is the stem associated with the South and thus Yang.

Conclusion

The relationship between us and the Dao it clearly described in this text. Chinese Medicine and the Dao are not static concepts but concepts that change in time.

And so, what begins as a description of months and movements reveals itself as something far greater. The eternal Dao is a living rhythm that breathes through all things.

Heaven rises, Earth responds, and within this exchange, life unfolds. The waxing of Yang, the gathering of Yin, the quiet return to stillness - these are not distant processes, but the very currents that move within us. The organs do not act in isolation, nor does the human being stand apart. We participate in this continual transformation, whether we are aware of it or not.

To understand this is to begin to see differently. The seasons are no longer external markers of time, but expressions of an inner landscape. Growth, flourishing, decline, and storage are not merely changes in nature, but reflections of our own Qi as it follows the Dao.

In this way, the study of such texts is not only an intellectual exercise, but a refinement of perception. It invites us to align, to listen, and to move with what is already in motion.

For the Dao is not something to be found elsewhere, it is present in every cycle, every transformation, and in every breath.