《黄帝内经·素问·上古天真论》
其次有称为贤人的人，能够依据天地的变化，日月的升降，星辰的位置，以顺从阴阳的消长和适应四时的变迁，追随上古真人，使生活符合养生之道，这样的人也能增益寿命，但有终结的时候。
其次有贤人者，法则天地，象似日月，辨列星辰，逆从阴阳，分别四时，将从上古合同于道，亦可使益寿而有极时。
Secondly, there are those called "Wise Men" who are able to follow the changes of heaven and earth, the rise and fall of the sun and moon, and the positions of the stars, to follow the waxing and waning of yin and yang and adapt to the changes of the four seasons, follow the real people of ancient times, and make life conform to the way of health preservation. Such people can also increase their lifespan, but there is an end.