I also think that the mind is a very powerful aspect to health and healing and conversely to illness and misery. It is the very concept that luckman, who posted a few times here recently, has written about in his book.
All I know is that we weren't created to be diseased. We were created for the purpose of living to our full potential, which is enormous. The trick is to figure out the path along that tricky yet challenging highway of creativity.