 The Daoist ideal is to come to an understanding of the Dao, the fundamental nature of reality that explains all things in the world, and live according to it. Knowledge of the Dao is essential to the good life, but this knowledge cannot be learned from discourses, or transmitted by teaching. It is only known by experiential acquaintance. The Dao gives the universe a kind of grain, or flow, going against which causes human difficulty. The good human life is then one that respects the flow of Dao, and goes along with it. This is what is meant by “life in accordance with nature,” and is the insight behind the Daoist admonition of wu wei, sometimes glossed as “actionless action.” By paying attention to reality as it presents itself, a person can learn what the Dao is, and can experience unity with it. This picture of reality, along with the picture of how one can come to know it, heavily influenced the development of Ch’an Buddhism, which became Zen.