"Correct breathing must be deep, slow, even, and controlled by the mind and will. If it is deep it allows all the necessary rays and forces of nature to be drawn in and to reach every part of the body. If it is slow, then all possible benefits can be obtained before it is expelled again. If it is even, a rhythm is established in time with the rhythm of nature; the various vibrations of the body tune in with each other, and with the cosmic life-giving rays, thus producing a complete harmonious integration. If it is controlled by the mind and will, outside influences cannot upset the personal rhythm, nor distract the individual from his goal."