The body is an instrument for experiencing life; both the worlds, that within and that without, are reflected in this instrument. Therefore purity of the body is the first essential thing, and the most essential, in the path of spiritual attainment. Every civilization has a peculiar method of cleanliness, but the mystic is not satisfied with the customary manner.

Mystics have two views: one view is that external cleanliness matters nothing to them, and the other that it is most important. As the work of an astronomer depends upon a telescope, and as it is necessary for him to keep the telescope as clean as possible, so it is necessary in the life of the mystic to keep the body in a fit condition.

All the passages in the body are connected with the centers, which are most important in spiritual development, and it is upon the cleanliness and purity of these passages that spiritual development depends. Besides these nine passages it is necessary to keep the skin in a proper condition for spiritual purposes. It is from the mystical conception that humanity first learned the idea of clothes. There have been times when certain races painted their skin, and by certain yogis the body was covered with ashes; in ancient times the body was covered with the bark of trees.

But behind all this there was always an inclination to keep the skin in a proper condition. It is upon the cleanliness of the body that sensitiveness depends; therefore people who have no regard to the cleanliness of the body are less sensitive than those who have regard to it.

Besides the cleanliness of the outer part of the body it is equally important, perhaps more important, to consider the cleanliness of the inner part of the body. Mystics, therefore take precaution about whatever they eat and drink, and have methods of cleansing the inner part of the body also. No mystic in the East guides a pupil who has not first prepared his body for the spiritual purpose.

Cleanliness of the body, besides its importance for spiritual and moral development, also prevents serious disease.