The following is an extract from the Monkey Press book The Kidneys which has recently been re-edited and reprinted. This section is on the text of Suwen Chapter 5, which deals with the resonances of the five elements/phases. Here, at the beginning of the description of the resonances of the kidneys, Elisabeth Rochat de la Vallée discusses the nature of the north, water and their relationship to the origins of life.
suwen chapter 5:

‘The northern quarter gives rise to cold, cold produces water, water produces the salty, the salty produces the kidneys, the kidneys produce bones and marrow, marrow produces the liver; the kidneys master the ear.
‘In heaven it is cold, on earth it is water, among the parts of the body it is the bones, among the zang it is the kidneys, among colours it is black, among notes it is yu, among sounds it is to sigh, among movements which react to change it is to shiver, …among the expressions of will-power it is fear.
‘In the north there are always two animals – the snake and the tortoise.’ Read more