The true silence is not merely a silent tongue; it is a silent mind. To merely hold one’s tongue, and yet to carry about a disturbed and rankling mind, is no remedy for weakness, and no source of power.  Silentness, to be powerful, must envelop the whole mind, must permeate every chamber of the heart; it must be the silence of peace.  To this broad, deep, abiding silentness a man attains only in the measure that he conquers himself.  — James Allen