Healing without drugs and medicines is the most natural method, although the absolute neglect of them is inadvisable. There are cases in which surgical instruments are also permissible but only when absolutely necessary. If horses can move wagons, why should engines be used? In the same way if a disease can be cured with a simple remedy the mental power should not be wasted, for it may be used in a more serious case. If every malady were to be healed mentally then why were all drugs and herbs created? On the other hand diseases which will yield more easily to mental treatment should not be left entirely to material remedies, for their root must first be healed.