The three months of winter are called blockage and storage. The water is frozen and the earth is cracked. The yang qi of nature is stored without disturbance. A man should sleep early, and get up late after the sun shines, so as to make his mind seemingly hidden, as if he had private thoughts or has acquired a thing. Evade cold and approach warmth, do not sweat excessively to render his yang qi frequently depleted. These behaviors are responses to the winter qi, and ways of nourishing storage. If he is disobedient to these, the kidneys will be spoilt, and atrophy and qi reversal disease will occur in the spring, because of a bad basis for spring generation.
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