Most people think of health primarily as a state of body.  But many ancient cultures, including those in Biblical times, understood the link between one’s state of mind and one’s state of health.  No one understood this better than Christ Jesus.  Mary Baker Eddy was a lifelong student of his practice of spiritual healing.  “Again and again I asked myself” she wrote, “what was the method by which Jesus helped the sick and the sinful?”  In the pages of Science and Health, she recorded her insights.  

Our Master asked: “How can one enter into a strong man’s house and spoil his goods, except he first bind the strong man?” In other words: How can I heal the body, without beginning with so-called mortal mind, which directly controls the body? When disease is once destroyed in this so-called mind, the fear of disease is gone, and therefore the disease is thoroughly cured. (p. 399:29–4)

The ordinary practitioner, examining bodily symptoms, telling the patient that he is sick, and treating the case according to his physical diagnosis, would naturally induce the very disease he is trying to cure, even if it were not already determined by mortal mind. Such unconscious mistakes would not occur, if this old class of philanthropists looked as deeply for cause and effect into mind as into matter. (p. 161:24–31)

Jesus never spoke of disease as dangerous or as difficult to heal. When his students brought to him a case they had failed to heal, he said to them, “O faithless generation,” implying that the requisite power to heal was in Mind. (p. 147:32–4)

Whatever guides thought spiritually benefits mind and body. (p. 149:28–29)