Illness is caused more by malnutrition of the mind than of the body. Doctors often speak of vitamin deficiency; I will call it the deficiency of vitamin 'G', and I will recommend the repetition of the name of God. That is vitamin "G"! That is the medicine; regulated life and habits are two-thirds of the treatment, while the medicine is just one-third only. Fear is the biggest cause of illness.
(Sanathana Sarathi, March 1996, pg 75)