A sentence in slip number 21, group A of the Guodian Laozi manuscript is found not only in chapter 25 of the received editions of the Daojing but also in two manuscripts: the Mawangdui silk manuscripts dated from the early Western Han Dynasty and the bamboo slips dated from the middle of the Western Han preserved at Peking University. However, in these editions there are a number of textual variants, which have been discussed by scholars on numerous occasions. In order to discover the original intended meaning of this chapter in the Laozi, it is necessary to revisit the issue based on existing scholarship and provide new explanations.