The lungs, manifesting the metal principle, are a female organ located above the diaphragm. The liver, manifesting the wood principle, is a male organ located beneath the diaphragm. The heart, manifesting the fire principle, is the major yang organ
This passage presents the Five Phase schema in its most direct psychosomatic application, correlating each of the five phases with a specific internal organ, gendered polarity, and bodily location as the basis for Hakuin's meditative medicine.
, Wild Ivy: The Spiritual Autobiography of Zen Master Hakuin, 1999thesis