To do nothing that you cannot see or hear in comfort. To moderate one's desires. To avoid tricks and plotting. Those who place no obstacles to their will and thought will find themselves in the realm of nature, and will do no harm to one's natural self.
適耳目，節嗜欲，釋智謀，去巧故，而遊意乎無窮之次，事心乎自然之塗，若此則無以害其天矣。