Then the breath must be made vital. Sometimes the breath is not vital, it is weak, and for that reason it cannot be discerned. What must be done to make it vital? When we want to strengthen our muscles we exercise them. The breath must be exercised. The jelal breath has a connection with the sun. The jemal breath has its connection with the moon. The breath flows either through one nostril or the other, but there are times when it flows through both nostrils. This is kemal, the uniting of the two currents which brings about the destruction of the effect of both. There are ways of changing the breath from jelal to jemal, from jemal to jelal.