Let me start by saying I am not a medical professional, and on the topic of the medical sciences, I hold zero credentials. I know nothing in the medical sciences which can be relied on.
That said, I believe this -- most disease is not disease at all (in its origins). It is dis-ease, that turns into disease.
We are all 70% water. That is our makeup, and yet we obsess about the physical body.
We are, to quote author Deepak Chopra, "not human beings having a spiritual experience, we are spiritual beings, having a human experience."
To quote David Brooks in Social Animal, "the human mind can take in 11 million pieces of information at any given moment. The most generous estimate is that people can be consciously aware of forty of these." Brooks goes on to note that "some researchers have gone so far as to suggest that the unconscious mind does virtually all the work and that conscious will may be an illusion." He concludes this section by noting "the conscious mind merely confabulates stories that try to make sense of what the unconscious mind is doing of its own accord."