Increased blood pressure accounts for abnormal appetites and desires and stimulates our lower natures to greater activities, and opposes our entry to our inner worlds. This pressure destroys the nerves that cause the cells of the brain to open and shut. As we breathe, these nerves open the cells to the energy passing through the body, and if they are shut through abnormal pressure from sudden exertion this increases the lower centres to a greater alertness and activity and shuts off the inner worlds from the student and prevents him from receiving their instructions.
We must therefore use a method whereby we can shut off the influences of our lower nature. In the heart there is a small valve that opens and shuts off interruptions from the lower seats of consciousness. Later we slowly realise that the Innermost uses a system of irrigation canals through which flow the beautiful substance that will fertilise our growth and understanding of our own possessions.
We not only breathe with our lungs but every brain cell is furnished with what we analyse as lung passages that collect atoms to impress us with their intelligence.