CHINA – The Chinese concepts of yin and yang represented shadow and sunshine, with the moon as ruler of yin and the sun as yang. The beliefs and rituals surrounding Chinese cosmology were always aimed at restoring the balance of lunar, or receptive energies, and solar, or active energies.
INDIA – In India, the ultimate goal of hatha yoga—ha translating as sun, tha as moon, and yoga as union—is the spiritual practice of concentrating on the breath to achieve the marriage of the active solar and receptive lunar energies within the human body, be they male or female. Breath is also central to the Kundalini tradition of India. Here, the left nostril is believed to carry the lunar current, or Ida; the right nostril, the solar current, or Pingla, to achieve enlightenment. Practitioners of this tradition breathe these two energies, the solar and lunar, through each of the psychic chakras, or energy centers, of the body. Within the sacred tradition of alchemy, a prerequisite to male union with the opposite sex, is union within the male and within the female of the sun and the moon.