Understanding of "nourishing Yang in spring and summer, nourishing Yin in autumn and winter": Yang for human growth in spring and summer, and Yin for human collection in autumn and winter.

Yang Qi and Yin Qi in nature refer to the growth qi in spring and summer and the gathering qi in autumn and winter respectively, specifically, spring, long summer, autumn harvest and winter storage. In spring, the yang rises, and what is bred between heaven and earth is the qi of hair growth. Therefore, the living do not kill, the giver does not take away, and the reward does not punish, in order to adapt to the spring. Nourishing yang in spring is to make the body and mind full of vitality, and don't contain it.

In summer, the yang is strong, the yin lies on the ground, and the qi of heaven and earth intersect, which breeds the "Qi Long". Therefore, the key to raising yang in summer is not to hate long days, to pay attention to the will to recuperate, and not to get angry or sad easily, so as to enrich yourself.

"Nourishing yang in spring and summer, nourishing yin in autumn and winter" is a rhetorical method using mutual words in ancient Chinese, which requires that "writing refers to each other and seeing the text refers to something", that is, the upper and lower sentences seem to say two things, which are irrelevant, but in fact they echo each other, explain each other and complement each other. When understanding its meaning, we should integrate the two aspects, not be paranoid and not separate.

1. Nourishing yang in spring and summer and nourishing yin in autumn and winter means nourishing yang for human growth in spring and summer and nourishing yin for human collection in autumn and winter. Yang Qi and Yin Qi in nature refer to the growth qi in spring and summer and the gathering qi in autumn and winter respectively, specifically, spring, long summer, autumn harvest and winter storage.

2. In spring, the yang is rising, and the spirit of hair growth is bred between heaven and earth. Therefore, don't kill those who are born, don't take away those who are given, and don't punish those who are rewarded to adapt to the spirit of spring. Nourishing yang in spring is to make the body and mind full of vitality, and don't contain it.

3. In summer, the yang is strong, the yin is lying on the ground, and the qi of heaven and earth intersects, which breeds "long qi". Therefore, the key to raising yang in summer is not to hate the long days, to pay attention to the will of conditioning, and not to be angry or sad easily, so as to enrich yourself.

4. Autumn is the harvest season. Yin Qi lying underground began to rise, and the autumn wind was cool and strong, which gave birth to a convergent and pure "gas gathering". Therefore, nourishing yin in autumn should also conform to the convergence of autumn, focusing on ease and tranquility to reduce the punishment of cold air in autumn.

5. In winter and March, Yin Qi is extremely high, everything lurks, and nature presents a scene of seclusion. Therefore, the method of nourishing yin in winter is to go to bed early and get up late, avoid cold and store essence, and warm and nourish yin to adapt to the "closed storage" of nature. In a word, the key to keeping healthy in the four seasons is appropriate cold and summer.