我国古代智慧的先人们,在对自然界各种事物和现象以及结合自身的观察过程中,认识到世间万物都是不断运动变化的,人的生老病死、天空日月星辰变化、社会的日新月异、春夏秋冬的更替等等,都属于阴阳二气有序的消长运动。人体作为有形之躯,它的方方面面也都可以运用阴阳进行说明。《皇帝内经·灵柩·顺气一日分四时》中说到,“春生夏长,秋收冬藏,是气之常也,人亦应之,以一日分四时,朝则为春,日中为夏,日入为秋,夜 In the process of observation of various things and phenomena in nature and in combination with their own, the forerunners of ancient Chinese wisdom realized that all things in the world are constantly changing in motion. People are born and died, the stars and stars in the sky change, and the society changes with each passing day. Spring Summer, autumn and winter replacement, etc., all belong to the yin and yang orderly movement. The human body as a tangible body, it can also use all aspects of yin and yang to illustrate. As the Emperor said, ”When the spring is long and the summer is harvested, it is common for the people to keep the harvest in the autumn. , Japan and China for the summer, into the autumn, night