Whatever we do for the love of God benefits our souls and our lives in a way that ego-motivated actions never can. Whatever we do for the love of God is done with sincerity because it is not motivated by self-interest. We leave our concern for gain and loss, success and failure, in the hands of God. We stop considering ourselves as the sole cause of our actions and their results. Consequently, we become the instruments of a deep wisdom and love.
God is the friend of silence. See how Nature -- trees, flowers, and grass -- grow in stillness; how stars, moon, and sun run their course in silence. The more we receive through quiet prayer, the more we can give in the activity of our daily lives. In essence, it is not what WE say, but what GOD says in us and through us. All our words are useless if they do not come from within.