When a gong or "singing bowl" is struck in the silent stillness, a reverberating sound is suddenly born...it lingers briefly...decays and dies. The sound can represent the span of our life-experience, but never our Life. Our true self is not the perishable sound, but the imperishable, still silence from which the sound arose and resonated temporarily. Indeed, this truth has even greater depths for it may be understood, that in our essence, we are none other than That which strikes the gong, so to speak, and silently witnesses the resulting "sound."
Breathing is one internal function that the conscious mind can control with comparative ease. The effect of controlled breathing is almost like communication with all conscious parts of one's being saying to them, "Simmer down and listen; there is something beyond the turmoil". It is communication in action that often works when words merely go in one ear and out the other, not even changing the cognitive mind. In essence, the effect is to turn all the elements of our will toward stillness and waiting.