 The plenitude of nature reflects the inexhaustible resourcefulness of the Dao. Moreover, phenomena conform to constant principles and function in harmony. In his Zhuangzi essay, Ruan details in traditional cosmological terms how the original qi differentiates into yin and yang, the two basic forms of vital forces or energies that not only shape but continue to govern the phenomenal world. Male and female, the hot and the cold, light and darkness, and other yin-yang correlates underpin the structural order of the Daoist universe. The movement of the sun and the moon, the regularity of the seasons, the operation of wind and rain, and other natural processes disclose further a dynamic regime of self-regulating change and renewal. In this way, an inherent order is shown to lie at the heart of ziran. As in Ji Kang’s analysis, this forms the basis of an ethics of naturalness.