I found this article, by Dr. Bruce Lipton, really interesting.
From the article:
"This new perspective of human biology does not view the body as just a mechanical device, but rather incorporates the role of a mind and spirit. This breakthrough in biology is fundamental in all healing for it recognizes that when we change our perception or beliefs we send totally different messages to our cells and reprogram their expression. The new-biology reveals why people can have spontaneous remissions or recover from injuries deemed to be permanent disabilities."