As the great sage Dhanvantari instructed Suśruta, he spoke with clarity and compassion about the intricate workings of the human body, the nature of disease, and the path to health. He began by describing the various disturbances that arise when the vital airs—vāyu—are obstructed or afflicted. He explained that when the body suffers from an increase of menstrual flow, excessive heat, or retention of urine, it is often due to the obstruction of breath by phlegm. This leads to symptoms such as noisy breathing, snoring, and a general sense of blockage in the respiratory passages. Alongside these, one may observe spitting, profuse sweating, difficulty in breathing, and an uncomfortable accumulation of breath. When the upward-moving air, udāna, is affected, heaviness in the limbs, loss of appetite, and a hoarseness in the voice manifest. The body may lose its strength and color, with the joints and bones becoming sites of accumulation, the limbs growing heavy, and the person becoming noticeably corpulent. Further, when the balancing air, samāna, is disturbed, a person becomes ignorant of proper actions, ceases to sweat, and suffers from a weakened digestive fire. If the downward-moving air, apāna, is afflicted, there is a complete expulsion of urine and feces. In this way, the disorder known as vātarakta is said to manifest in twenty-two distinct types, with the vital airs and other bodily elements disturbing one another in succession. Dhanvantari emphasized that there are twenty types of bodily obstructions to be recognized. These can present as palpitations, suppression of breath, chills, and headaches. When the vital breath prāṇa is obstructed by apāna, heart disease and dryness of the mouth occur; when prāṇa is blocked by udāna, there is a notable loss of strength. He instructed that a wise physician must carefully examine and distinguish all such obstructions, considering the locations of the winds, their increase or decrease, and their specific actions. Sometimes, pitta—the bile—becomes obstructed in mutual relationship with the five vital airs, and its presence is mixed with other bodily elements, leading to complex disorders. The attentive physician recognizes these mixtures by their characteristic signs. Even strong obstructions, Dhanvantari assured, can be relieved through repeated and appropriate remedies. However, the vital airs prāṇa and udāna are especially important, for they are the very sources of life and strength; when these are gravely afflicted, the loss of life and vigor follows. He warned that winds which are either unknown or known but displaced from their proper seats are exceedingly difficult to cure, even with great effort, and may lead to further complications. Neglecting such disturbances can result in abscesses, disorders of the spleen, heart disease, abdominal tumors, and ailments related to digestive fire. Turning to Suśruta, Dhanvantari declared that the causes of these diseases had been explained as taught by Ātreya, so that all might discern the nature of ailments and strive for the betterment of human life. Understanding the roots of disease, one should then proceed with treatment. Among remedies, Triphalā—either alone or with honey, ghee, and jaggery—is a potent medicine for all diseases. Triphalā combined with long pepper, or even by itself, destroys all maladies; it may also be mixed with śatāvarī, guḍūcī, dried ginger, fire, and viḍaṅga. A host of other healing herbs were named: śatāvarī, guḍūcī, dried ginger, mūṣalikā, balā, punarnavā, bṛhatī, nirguṇḍī, neem leaves, bhṛṅgarāja, āmalaka, and vāsaka, or their juices. Triphalā, processed once or even seven times, as previously described, can be prepared in various forms—powder, sweet balls, tablets, ghee, oil, or decoction—depending on availability, and administered in measured doses to counteract wasting diseases. With the section on causes thus concluded, Dhanvantari prepared to impart the essence of perfected remedies for all diseases, for the sake of the well-being of all beings. He explained that the aggravation of wind (vāyu) arises from foods that are astringent, pungent, bitter, sour, or dry, as well as from emotional disturbances such as worry, sexual activity, excessive exercise, fear, grief, and sleeplessness. Loud speech, carrying heavy weights, strenuous activity, and overexertion also provoke wind, especially during storms, after digestion, and at the end of the day. Bile (pitta) is aggravated by hot, sour, salty, alkaline, pungent, and indigestible foods, as well as by excessive heat, fire, distress, alcohol, and anger. The times when bile tends to increase include burning sensations, after eating, midday, after the clouds have passed, in summer, and at midnight. Phlegm (kapha) is increased by sweet, sour, salty, oily, heavy, and cold foods, by consuming new rice, slimy foods, fish, and meat, as well as by lack of exercise, sleeping during the day, and indulgence in the comforts of bed and seat. Phlegm is particularly aggravated after eating and in spring. He described the signs of these humors: Wind manifests as roughness, contraction, obstruction, numbness, goosebumps, stiffness, dryness, darkness of complexion, separation of limbs, weakness, and fatigue. A disease with these features is wind-based. Bile disorders present with burning, heat, moistening of the feet, redness, exhaustion, bitterness, sourness, foul smell, sweating, fainting, excessive thirst, dizziness, and yellow or green discoloration. Phlegm disorders show as oiliness, sweetness, slowness, binding, stillness, lack of satisfaction, heaviness, swelling, itching, drowsiness, and lethargy. When two humors are involved, the disease shows a combination of causes and symptoms; when all three are present, it is called sannipātika, marked by the mingling of all causes and signs. Dhanvantari then summarized the foundational principles: The body is the support for the humors, tissues, and wastes. Health is the state of their balance; disease arises when any increase or decrease occurs. The tissues are fat, blood, flesh, marrow, bone, and semen; the humors are wind, bile, and phlegm; wastes include feces, urine, and others. He described wind as cold, light, subtle, and steady, causing loss of voice when aggravated; bile as sour, pungent, hot, and foul-smelling, often the source of disease; and phlegm as sweet, salty, unctuous, heavy, and very slimy. Wind resides in the rectum and hips, bile in the colon, and phlegm in the stomach, throat, and joints of the head. The tastes that provoke wind are pungent, bitter, and astringent; those that increase bile are pungent, sour, and salty; and those that increase phlegm are sweet, hot, and salty. Using the opposite tastes pacifies the disturbed humor, calming disease in the sick and maintaining well-being in the healthy. He further explained that sweet taste benefits the eyes and increases tissue fluids; sour taste pleases the mind and heart and stimulates digestion; bitter taste kindles digestion, destroys fever and thirst, and purifies and dries; astringent taste reduces bile, scrapes, constricts, absorbs, and dries. Thus, with wisdom and compassion, Dhanvantari imparted the knowledge of causes, symptoms, and remedies, guiding Suśruta and all who would listen toward the path of health and the preservation of life.