Your intention creates energy and focused energy can change things. An intention is quite magical when viewed in this way, because it is the human capacity to consciously make manifest the unmanifest. A powerful intention for healing is an indispensable ally if you are plagued with chronic sickness. Unfortunately, the converse is equally true and far more common. A healing professional who does not generate an intention for healing does no favor for the patient he serves.
Healing happens by degree in many ways, with physical healing being only the most obvious kind.
A powerful intention to heal my own cancer unexpectedly led me to begin healing parts of my self that I'd never considered before. To begin, I had to examine and heal my relationship to fear. In my experience, there is typically never just one reason why we get sick and conversely, there is usually not just one reason why we get well. The mystery endures. We may never know all the reasons for our sickness or our health, but I am convinced that we can positively affect both by the inner and outer environments that we create in our lives.