Will is composed of wish and aspiration said in Yellow Emperor’s Inner Canon. Wish is the expression of god of spleen, and aspiration is the expression of god of kidney. Spleen has the function of transfer and digest, so it reflect the relationship of the body.
Aspiration condition can be told by your kidney. When you are young, your kidney is in best condition, so children have the biggest aspiration. When getting old, your kidney turn in bad health, so old people always have no aspiration at all.
