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.
The true source of joy is love -- love of God, love of beauty, love of wisdom, love of another human being, it does not matter which. It is all one love: a joyful awareness of dissolving boundaries of our ordinary narrow self, of being one with the reality beyond, of being made whole.
