Wang Bi observes that the softest thing drives through the hardest. Non-being enters where there is no gap. From this he understands the benefit of non-action. The teaching without words and the benefit of non-action are rarely matched in the world.

Heshang Gong says water is the softest thing, yet it penetrates solid metal and stone. The Dao, formless and without substance, passes through all gaps. The teaching without words and the benefit of non-action bring more benefit to spirit and state than endless toil.