Nervous diseases are very often treated by giving medicines. There is no medicine in the world which can do good to nerves; for nerves are the most natural part of one's being. They are the part of one's being which is linked with the physical world and with the mental world. It is the central part of one's being and there is no better remedy for nerves than nature, a life of rest and repose, quiet, proper breathing, proper nourishment, and someone to treat the patient with wisdom. By understanding the law of environment and climatic influences, by understanding what influences people have upon such a patient, one can cure him.