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 life of prayer is a journey with God as well as toward God, a journey in which prayer becomes for those who pursue it as natural as breathing. The first big step is to cease talking TO God and start listening FOR God. And that requires silence. Silence is the language God speaks, and everything else is a translation. "As long as you know you are praying, you are not praying properly", says Benedictine monk David Steindl-Rast. When everything we do is prayer, the fruit is an increase in love, patience and compassion for others, leaving behind the unmistakable taste of holiness.
~ from "Talking to God", Newsweek, January 6, 1992