Tao Te Ching was written around 4 BC but still remains one of the most influential works in the study of "tao". Tao is one of the classical philosophies in the foundation of Chinese culture. In 81 chapters, Lao Tzu uses the tao, or the flow of everything to explore the "Way".The Way refers to the natural unfolding of order and progress into society and into the world. Taoism, or the study of tao, is a personal progression towards ultimate harmony with tao. Tao Te Ching introduces elements such as personal knowledge and virtue in order to move closer toward the goal of tao.