The Reciprocal Mode
As detected in the image of the Hexagram 31 (Xian Gua) in the Book of Changes, the two kinds of vital force stimulate and respond to one another such that they join together. The one is passive, and the other joyous. The male takes a place below the female, which shows how “prevalence is had”, how “it is fitting to practice constancy”, and how “to marry a woman means good fortune”. Empirically, this hexagram implies reciprocity as a matter of stimulation with regard to the natural intercourse between a young man and young girl. Hereby it can be perceived as the reciprocal mode of harmony between two sexes.