Like the Earth, human body have inner and outer protection. As our planet have the atmosphere protecting the Earth, so as the man have its outer cover protecting the body from outside invasions.
Like our planet, our body has energetic field that protects our body from outside invassion. From this outer energy field that our body has the diagnostic procedure of tawas works.
It is amazing that we can detect and prevent illness through tawas by dealing with our psycho emotional health.