Topic on correspondences and manifestations of Yin and Yang the plain questions (Fifth Article-Part XII) [1]

Hence, everything up and down exists between the heaven and earth; The yin and yang decide male and female, also qi and blood in human body; the left and right are the ways of the yin and yang; water and fire are the verification of the yin and yang; the yin and yang are the root of everything.

So it says that: the yin that stays inside is the defender of the yang; the yang that stays outside is errand of the yin.

Key words: topic on correspondences and manifestations, Yin and Yang, the plain questions