Mind cannot be controlled it can only be tamed. Yoga is the first basic step in which one can tame the mind. By taming the body one can tame the mind. The steps of taming the body and finally the mind are the real purpose of yoga. Basically you are instructed to do some regular pattern of movements, which is continuously done over a period of time, tames the mind to obey.
Healing occurs when the co-ordination of mind and body is restored.
Healing is a process that takes place only when there the mind and the body are aware of each other. Our mind is always attracted to the exterior world and never gets a glance of our interior body's world. Only when we fall sick we are aware of our body. Sickness should not be taken in a negative way. It is a signal, which demands the attention of the mind over the body.