1. During the Warring States Period, Wen Zhi, a famous doctor, said to Qi Weiwang, "My way of keeping in good health is to put sleep first. People and animals can only grow up by sleeping, which helps the spleen and stomach digest food. So sleep is the first supplement to health. If people don't sleep for a night, they can't recover for a hundred days. "

2. Li Yu, a physician in Qing Dynasty, once pointed out: "The key to keeping in good health is to take sleep first. Sleep can be refined, sleep can nourish qi, sleep can strengthen the spleen and stomach, and sleep can strengthen bones and muscles. "

3, people often say: "medicine is not as good as food, and food is not as good as sleep." People should conform to the laws of nature and follow the sun, that is, I get up in the morning and go to bed in the morning, and get into the habit of going to bed early and getting up early, instead of going against the sun.

Zeng Guofan specifically mentioned one point in his Twelve Laws of Self-cultivation: sit quietly for four minutes every day to experience the kindness of returning. No matter how busy and tired he is, he spends four minutes sitting still every day. Sitting still may be cross-legged or sitting. Zeng Guofan experienced all the nirvana silence in this way, and the energy came back.