Breathing forms the most vital process of life-activity. This action keeps up till the time of death and, in the meantime, the blood is being purified and aerated through the lungs. All the organs of the body work in rhythm as long as they are kept supplied with pure blood from the heart. Moreover, few people know, and fewer still care to know that every change in the mental state is accompanied by a corresponding change in the volume, force and rhythm of respiration. Likewise, the yogis maintain that the rise and fall in the depth of respiration cause a corresponding change in the activity of the brain; and that such a continual interaction between the brain and the lung can be safely utilized for supra-physical and supra-mental achievements.
I'll talk more about this and describe some of these techniques in a future post. Keep in touch.