Chapter Twelve: Cultivation of Body and Mind — Nourishing the Kidneys, Protecting Yang, Warming and Supplementing, Securing and Storing

I. Winter Governs the Kidneys: Why Does Lesser Cold's Health Cultivation Center on the Kidneys$18

The single most essential principle of Lesser Cold health cultivation is "nourishing the kidneys." Why$19 In the system of Chinese medicine (whose theoretical roots can be traced back to pre-Qin yin-yang and Five-Phase thought), the five organs correspond to the Five Phases and the five seasons: the liver belongs to Wood and governs spring; the heart belongs to Fire and governs summer; the spleen belongs to Earth and governs late summer; the lungs belong to Metal and govern autumn; the kidneys belong to Water and govern winter.

The kidneys, in Chinese medical theory, are "the foundation of prenatal constitution" and "the organ that stores vital essence." The Huangdi Neijing (Inner Canon of the Yellow Emperor, "Su Wen") states: "The kidneys govern hibernation; they are the root of sealed storage, the dwelling place of vital essence (jing)."

Note the term "sealed storage" (fengcang)! The kidneys' fundamental function is sealed storage — keeping the most refined, most precious "vital essence" of life deeply stored and guarded, preventing its reckless depletion. This "sealed storage" function corresponds precisely to winter's theme of "closing and concealing." Nourishing the kidneys in winter means nourishing this fundamental power of "sealed storage" and "securing the root." Only when the kidneys are well nourished and vital essence well stored in winter can the body's vitality (like the underground ascending yang energy) surge forth fully and healthily in the coming spring.

II. Protecting Yang: Caring for the Newly Born, Gradually Ascending Yang Energy

The second essential principle of Lesser Cold health cultivation is "protecting yang" — caring for, safeguarding the body's newly born, gradually ascending yang energy.

This nascent bodily yang energy, like the Lin hexagram's newly born two yangs and like a just-sprouted seedling, is at its most tender and most in need of care. If at this time one fails to protect it and instead depletes or damages it through excessive exposure to cold, overwork, or overexertion, the root of this nascent yang will be harmed, and the year's vitality will be compromised at its very beginning.

How does one "protect yang"$20 Most fundamentally, by "avoiding cold and seeking warmth" — shunning bitter cold, tending toward warmth, ensuring adequate warmth, especially for areas where yang energy is most easily depleted (head, neck, back, and feet). "Cold enters from the feet below" — the ancients placed great emphasis on keeping the feet warm. Further, one should "go to bed early, rise late, and wait for the sun" — in winter, one ought to sleep early and rise late, waiting until the sun has appeared (yang energy has risen) before getting up to move about, thereby conforming to winter's pattern of yang energy lying concealed. Additionally, moderation — in intimate relations (to preserve kidney essence), in emotions (to avoid disturbing yang energy), and in all excessive expenditure — allows the nascent yang to grow peacefully and healthily in a state of moderation and concealment.

III. Warming Supplementation: The Way of Warmth in Dietary Health Cultivation

The core dietary principle of Lesser Cold health cultivation is "warming supplementation" (wenbu) — using warm, nourishing foods to ward off cold, nourish the kidneys, protect yang, and secure the root.

Yet warming supplementation must also observe moderation — the Way of the Mean. Though Lesser Cold calls for warming supplementation, one must not indulge in excessive or extreme supplementation. Excessive warming supplementation generates internal heat, paradoxically disturbing the yang energy that should be lying concealed and violating winter's overarching principle of "concealment" and "stillness." Therefore, while warming, one must also attend to "harmony" — warm without drying, supplementing without clogging, both warding off cold and nourishing the kidneys without disturbing the concealed energy.

IV. Cultivating the Heart and Guarding Stillness: Lesser Cold's Spiritual Health Cultivation

Health cultivation during Lesser Cold nourishes not only the body but also the heart — the spirit, the mind.

Why must Lesser Cold health cultivation include "guarding stillness" and "cultivating the heart"$21 Because winter governs "storing," and not only the body must store (concealing yang energy, sealing kidney essence) but the spirit must also "store" — drawing the mind inward, letting emotions settle into tranquility and peace, preventing them from becoming overly excited, outwardly directed, or agitated. The Huangdi Neijing advises that in winter one should "let the will be as if concealed and hidden, as if harboring private thoughts, as if already having attained what one seeks."

This convergence of "cultivating the heart and guarding stillness" in health cultivation, of the Confucian practice of "reverent attentiveness," and of the Daoist practice of "emptiness and stillness" — all three, from different entry points, point toward the same state: during Lesser Cold, the coldest and most concealed of seasons, let body and mind alike return to tranquility, concealment, and peace, and within the deepest stillness, nourish the vitality that will burst forth with spring.