Dear Rika
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
Well, actually, “anxiety” is the essence and nature of this world.
Conversely, “stability” is something that is currently impossible in this world.
The reason for this is that the “Big Bang,” which is the beginning of this universe, began with “instability” (imbalance of collisions between opposing superelementary particles).
Because of that instability and imbalance, various situations developed even after that, and everything on Earth and in space is now able to exist like this.
In other words, if we weren't “unstable” or “unbalanced,” it means we wouldn't have known we existed.
In terms of Buddhism, this is explained as “impermanence,” “immortality,” “emptiness,” or “luck,” but putting aside difficult things for now, anyway, it is precisely because it is “unstable,” that the flow of “cause and effect” and “causality” of cause, condition, and effect is also established.
Going back to the story a bit, the reason our minds become “anxious” is, in short, due to not understanding the essence or nature of this world, and we seek “stability” no matter what, and we desire “stability.”
If you replace this “stability” with Buddhist terms, it becomes “something that never changes forever” or “something that exists independently” as “substance” or “self-identity,” etc., but if there is such a thing as “stability,” it is an inorganic world where nothing changes, a world that doesn't move where everything has stopped forever, or a world that is nothing, and how can Rika think of such a world in reverse I wonder...
However, it is an imaginary world where such a world is impossible, and in the real world, “instability” is essential, and after first acknowledging it, on the contrary, they understand that it is something that changes in various ways and can be made to change, and in terms of Buddhism, I want to follow a better flow due to better causal relationships, and eventually move towards the results of Satoru and Nirvana.
Kawaguchi Hidetoshi Gassho