The places of the earth which are hidden from the sun, which are not touched by the air, become damp; several little lives are created there, germs of destruction are born, and the air in that place becomes dense. If this is true, then the body also needs the sun and air. The lungs, intestines, and veins and tubes of the body all need the sun and the air; and these are taken in by means of perfect breathing; and even the mind derives benefit from this. For the mind too is composed of five elements, the elements in their finest condition.