The body appears to be largely self-motivated and independent, yet it actually responds only to the intentions of the mind. If the mind wants to use it for attack in any form, it becomes prey to sickness, age and decay.

It's a typical modern disease. I think its causes are of a moral order. The great majority of us are required to live a life of constant, systematic duplicity. Your health is bound to be affected if, day after day, you say the opposite of what you feel, if you grovel before what you dislike and rejoice at what brings you nothing but misfortune.