The chapter opens with two images of stability and then names a consequence that is startling in this book. What is well planted cannot be pulled up. What is well held cannot be taken. And so sons and grandsons will not stop offering the sacrifices.
That last clause assumes the ancestral cult, the regular offerings a lineage makes to its dead, and it treats the continuation of those offerings as the measure of a thing well founded. An unbroken line of descendants performing the rites was the standard early Chinese image of a family that had lasted, and its opposite, a line extinguished and the sacrifices ended, was the standard image of ruin.
What makes the clause unexpected is the book's general attitude to ritual. Chapter thirty-eight places ritual at the bottom of a staircase of decline and calls it the thinning of loyalty and trust and the head of disorder. Chapter nineteen, on the received wording, asks for the abandonment of things that the ritual tradition holds central.
Here the sacrifices are used without any of that criticism attached, as a plain measure of endurance. The chapter is not recommending the cult and it is not attacking it; it is borrowing the most familiar available sign that something has held.
The tension is real and it is one of the reasons the book resists being read as a single consistent argument. Different chapters draw on the ordinary religious and social vocabulary of their world in different registers, sometimes to reject it, as in chapter thirty-eight, sometimes to use it, as in the sweet dew omen of chapter thirty-two, and here simply to say that a well planted thing keeps going.