Like justness in a judge's decision, or beauty in a painting, soul is a quality of absoluteness in something relative. Understood profoundly, people are connected to the holiness of the world in such a way that they reveal a dimension of holiness in themselves, a dimension of depth that is absolute.
It is necessary that we find God, who cannot be found in noise and unpeace. 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 to us and through us. All our words are useless if they do not come from within.