We sustain our lives through two core tracts: the digestive tract and the respiratory tract. But we pay much more attention to eating than breathing because eating is conscious while breathing is not. However, I have seen the health of many people dramatically improve after they thoroughly cleansed their respiratory tracts, and I believe that being able to breathe well is necessary in order to achieve longevity and great health.
Several years ago, a middle-aged man told me how chronic inflammation of the mucus membrane of his nose (chronic rhinitis) drastically changed the course of his life.