The title of my post is a bit sensationalism just for fun , which I hope people don't mind, but it is not without any bit of truth. Human body is managed by subconsciousness, or whatever we call it. Our organs and blood vessels are controlled by it without our conscious mind noticing. This subconscious mind, however, is a childish being, subject to disturbances and may overreact to the external world in unreasonable ways. By taking care of it, we are hopeful to foster a healthy body, and chances of diseases such as cancer can be minimized.
For example, sometimes I use the method to tell my body to return to serenity. After a while, I feel my organs slowly move and set in a relaxed way, blood flows all over the body and to finger tips, joints and knuckles loosen with cracking sound. In short, my whole body sits in a very relaxed state and I can even feel it literally rejuvenated. No any medicine can achieve that feeling.
Not only in health, but also in philosophy, insisting on our higher self's purpose can lead to a higher degree of satisfaction in our life's journey. But this by itself is a big topic and deserves a separate discussion.