If you ask him: "What is silence?" he will answer, "It is the Great Mystery! The holy silence is His voice!" If you ask: "What are the fruits of silence?" he will say: "They are self-control, true courage or endurance, patience, dignity, and reverence. Silence is the cornerstone of character."
Charles Alexander Eastman, Michael Oren Fitzgerald (2007). “The Essential Charles Eastman (Ohiyesa): Light on the Indian World”, p.23, World Wisdom, Inc