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(First Section)
The upper half of the body is susceptible to pathogenic factors. (Yang meridians receive wind and qi.) The lower half of the body is susceptible to dampness. (Yin meridians receive dampness.) All gatherings of Yang meridians are located in the upper part of the body. If struck by pathogens on the cheeks, the pathogen descends to invade the Shaoyang meridian. If struck on the chest, back, or lateral costal regions, it also invades their respective meridians (i.e., the three Yang meridians). Pathogens invading Yin meridians usually start from the arms. The skin on the inner aspect of the arms is thin, and the flesh is moist and lustrous; therefore, they are easily affected by wind and uniquely injured by Yin pathogens (the inner aspect of the arm is called Yin, where the three Yin meridities of the hand and foot travel). Thus, when pathogens enter Yin meridians, if the Zang organ qi is substantial, the pathogen cannot lodge there and returns to the Fu organs. Therefore, invasion of Yang meridians causes the pathogen to flow into the meridians, while invasion of Yin meridians causes the pathogen to flow into the Fu organs. (For example, regarding the Heart and Small Intestine, this pathogen invading the three Yin meridians may also present with exterior syndrome symptoms.)

Sorrow, worry, and fear injure the Heart. External cold exposure and consumption of cold drinks injure the Lungs. (The Lung harmonizes with the skin and hair and fears cold.) Because external cold and internal cold interact, both the interior and exterior are injured, causing Qi to rebel and move upward. (External cold injures the exterior, while cold drinks injure the interior.) Falling or bruising leads to evil blood remaining inside. Great anger causes Qi to rise but not descend, accumulating under the hypochondrium, thereby injuring the Liver. Blows, falls, sexual intercourse after drunkenness, sweating exposed to wind, heavy lifting, excessive sexual activity, or bathing in water while sweating all injure the Spleen and Kidney respectively. (This section discusses pathogens injuring the five Zang organs.)

(After the Chapter on Official Needles)
What Heaven endows us with is called "De" (Virtue/Nature), and what Earth provides us with is called "Qi". Life arises from the flow of De and the interaction of Qi. The origin at birth is called "Jing" (Essence). (The foundational aspect of Jing is called "Po" (Corporeal Soul). Hun is Yang, Po is Yin.) That which receives and processes external objects is called the "Heart". Memory within the heart is called "Yi" (Intention/Thought). (Yi refers to reflection. A mental direction that is not yet fixed is called Yi.) What is retained by intention is called "Zhi" (Will). (Focus on a specific object is called Zhi.) Planning changes based on will is called "Si" (Reflection/Deliberation). (Plotting to realize this will is called Si.)

Fear and anxiety injure Shen (Spirit). When Shen is injured, fear ensues, leading to uncontrolled leakage and discharge (Chu Kong refers to fright; Liu Yin refers to leakage and overflow). Profound sorrow moving the interior leads to exhaustion and loss of life (Excessive sorrow severs the Bao Luo [Pericardium Collateral], causing loss of life. Jie is the gradual process of Jue [severance]). Excessive joy scatters Shen, preventing it from being stored (Shen cannot hold its course and wanders). Sorrow and worry cause Qi to block and stagnate. Extreme anger confuses and disorders the mind (Anger causes Qi rebellion, leading to confusion and chaos). Fear agitates and dissipates Shen, preventing its gathering (Shen scatters due to fear).

If the Heart is subjected to fright and anxiety, Shen is injured. Injury to Shen causes fear and self-loss, muscle wasting, withered hair, and sallow complexion, leading to death in Winter. If the Spleen is burdened with unresolved sorrow and worry, Yi is injured. Injury to Yi causes mental confusion, inability to move the four limbs, withered hair, and sallow complexion, leading to death in Spring. (Man sounds like 'man', meaning stifled/confused.) If the Liver is moved by profound sorrow, Hun is injured. Injury to Hun causes madness and lack of clarity; lack of clarity leads to impropriety (Loss of spiritual clarity leads to wickedness and impropriety). Symptoms include retraction of the genitals and tendon contraction, inability to lift the ribs, withered hair, and sallow complexion, leading to death in Autumn. If the Lungs experience boundless joy, Po is injured. Injury to Po causes madness; the mad person disregards others, skin and leather become scorched, hair withers, complexion becomes sallow, leading to death in Summer. If the Kidneys suffer unceasing anger, Zhi is injured. Injury to Zhi causes forgetfulness of past words, inability to bend or extend the waist and spine, withered hair, and sallow complexion, leading to death in Late Summer (Anger is primarily the emotion of the Liver but also injures the Kidney because Liver and Kidney have a mother-son relationship and their Qi connects).

Unresolved fear injures Jing. Injury to Jing causes bone soreness, flaccidity, and cold extremities, with spontaneous leakage of essence. (This also describes injury to the Heart and Kidney.) Therefore, the five Zang organs store Jing (Essence) and must not be injured. Injury leads to loss of control and Yin deficiency. Yin deficiency leads to lack of Qi. Lack of Qi leads to death.

The Liver stores Blood, and Blood houses Hun. Liver Qi deficiency causes fear; excess causes anger. The Spleen stores Ying (Nutritive Qi), and Ying houses Yi. Spleen Qi deficiency causes inability to use the four limbs and instability of the five Zang organs; excess causes abdominal distension and difficult urination and defecation (Referencing *Tiao Jing Lun*, excess form presents with difficult urination and defecation, similar to this). The Heart stores Mai (Vessels/Pulse), and Vessels house Shen. Heart Qi deficiency causes sadness; excess causes incessant laughter. The Lungs store Qi, and Qi houses Po. Lung Qi deficiency causes nasal congestion, difficulty breathing, and shortness of breath; excess causes panting (rapid breathing and coarse voice) and chest fullness requiring仰息 (breathing with raised chest). The Kidneys store Jing, and Jing houses Zhi. Kidney Qi deficiency causes cold extremities; excess causes abdominal distension.