In as much as it is necessary to cleanse and purify the body, so necessary, or perhaps even more necessary, is it that the mind be cleansed and purified. All impurity causes diseases as well as irregularity in the working of the physical system. The same applies to the mind. There are impurities belonging to the mind which may cause different diseases, and by cleansing the mind one helps to create health both in body and mind. By health I mean the natural condition. And what is spirituality but to be natural?