"The Tao Teh King, or the Tao and its Characteristics," is a book by the ancient Chinese philosopher Lao-Tze. In the book, Lao describes the Tao: as a guiding principle of the universe and all within it. The author explores the nature of dualities and complements, dissecting strength and weakness, presence and absence, and life and death. The Tao Teh King has served as a foundation for centuries of philosophy and wisdom.