Ziran, “self-so”, means naturalness or spontaneity. The Daodejing says that humans follow earth, earth heaven, heaven the Dao, and the Dao follows what is so of itself. It is the quality of action and being free of contrivance, and the model of the sage.
Ziran
Self-so: spontaneity, the natural way things are of themselves, which the Dao follows.
Also: tzu-jan, naturalness