The chapter closes on the most quoted sequence in the book after the opening of chapter one: man takes his rule from earth, earth from heaven, heaven from the way, and the way from what is so of itself.
The last step is the one that matters. Every rung until then hands authority upward to something larger, and a reader following the pattern expects the way to hand it upward again, to a highest term. Instead the sequence stops by naming ziran, which means what is so of itself, or the spontaneous, or the way a thing is when nothing is imposed on it. The way does not defer to a higher authority; it defers to there being no imposition. The ladder ends by declining to have a top.
That single term does an enormous amount of later work. Ziran becomes one of the two or three central words of Daoist thought, paired with non-action as the description of how the way operates, and it is the reason the tradition resists being read as theism. Nothing in this sequence is a will, and the highest thing named is not a being but a manner.
The chapter also inserts the king into the list of four great things alongside the way, heaven and earth. That inclusion has been read as evidence that the book is addressed to rulers throughout rather than to private readers, and some recensions read man rather than king in that position, which changes the claim considerably. The variant is old, the two readings support quite different books, and neither can be dismissed as a simple error.