Health depends upon the balance between activity and repose in the five senses: sight, smell, hearing, taste, and touch; and every sense, in the normal condition of health, must be able to express itself and to respond. The senses need more time for repose than for activity. Therefore the mystics go into seclusion in order to give a chance of repose to the senses, which are different in every man. Everyone passes every moment of his waking state in activity of the senses, partly by intention, partly involuntarily. For instance, the eyes look at things intentionally perhaps a hundred times a day, but nine hundred times they look at things without intention. This shows a waste of energy in an average man's life.

In order to develop healing power one must regulate and control the senses by regulating their activity and repose; and this, done with a spiritual thought, converts power of mind into divine power. A person can heal with power of mind alone, but the results will be limited; but a person with divine power can obtain through it unlimited results.

It depends on the condition of the health how much activity one can stand and how much repose is necessary; a general rule cannot be made for everyone. A normal amount of activity stimulates and strengthens the body. Therefore physical exercises are given for physical development, and exercises of concentration and studies are given for the development and repose of the mind. According to psychic law the day is natural for activity and the night for repose, and when this is not carried out it naturally works against health. It is not necessary to rest after every little exertion, but a degree of balance ought to be maintained; and it is advisable in life to take repose without allowing it to develop into laziness.