1 I have always advocated “fulfilling your human Dao [worldly obligations] first and then cultivating the heavenly Dao.” Everyone, regardless male or female, grows from youth to maturity, and inevitably has sexual desires. This is part of being alive, since the smallest constituents of our bodies are yin and yang etropons.
2 As Yijing [aka I Ching or the Book of Changes] stated, “Yin and yang together are the Dao.” The Dao is right here within us. In ancient times, it was also said that “eating, drinking, and finding a mate are basic and top among human desires.”
3 Sexual desires arise because there is yin and yang in the mind and body. Yang needs yin and yin needs yang. Only when yin and yang are mutually adapted can the mind- body be in balance. So, marriage between a man and a woman is part of the very fabric of life.
Quiet Sitting Forum, November 12, 1984
 Etropon is the smallest unit within matter in the universe. They can only aggregate into matter of varying fineness and size; no life force exists among them. Yin etropons are coarse, heavy and high in density, while yang etropons are fine, light, and low in density. (see A New Realm)