It’s an equilibrium that exists only in the intrinsicality of that combination.
Unique in space and time. A dance within the gravitational waves happening only ed exclusively there in Universe. So, what is the meaning? What is the purpose? The human that finds the exact position and the exact moment is the tool, and the stones are those that decide. Not the contrary.
They call to be the chosen ones. They show the place where to realize the balance. They choose which other stones combine and how - how many and in which position. Nothing, absolutely nothing, is decided by the human. It would be impossible to guess how the stones find their exact static momentum. The apparent simplicity of the combination and the elements concurring with it is only an illusion. In fact, the actual physics and the impossible dynamics - together - are indeed invisible and incommensurable.
And then, suddenly, with no evident reason, the construction collapses.
The stones decide. For the human, it’s an incomprehensible moment. Nothing has apparently changed in what we can perceive.
Only, we can imagine that something changed in Universe.