Our spiritual journey is deeply reflected by the evolution of the voice and by the ways in which we communicate with others. Our fears, softness, sharp edges, peacefulness, and joy are carried to others by our tone, words or lack of words. As people become more whole and in tune with themselves, they usually speak with greater simplicity, resonating from both heart and head.
The discipline of silence doesn't mean just taking a short vacation from the spoken word. It also means giving complete relaxation to the muscles, the tissues, the tongue itself. A modern writer once said: "Knowledge has never been known to enter the head via an open mouth." It is when you become completely silent that you are able to absorb knowledge. God speaks in silence. The discipline of silence is essential on the path.