The Voice of Knowledge is the fourth book in the Toltec Wisdom series by the best-selling author of The Four Agreements. Don Miguel Ruiz explores the concept of ''impeccability of the word'' as a simple yet potent prescription for countering the judgmental inner ''voice of knowledge.'' Adhering to ''the word'' - saying only what you mean, refusing to speak against you - allows anyone to transform those inner tyrannical thoughts into a voice of self-trust and integrity. Knowledge then becomes an ally, and life becomes an expression of the authentic self.