This fifth element is as important as the four already discussed in the foregoing pages. The human body which is composed of the five elements cannot do without any one of them. Therefore no one should be afraid of air. Generally, whenever our people go, they make devices to keep out the sun and the air and thus jeopardize their health. If one cultivates the habit of living in the open in the midst of plenty of fresh air, right from childhood, the body will become hardened and he or she will never suffer from cold in the head and the like ailments. I have said enough about the importance of fresh air in an earlier chapter. There is no occasion, therefore, to repeat here what has already been said.