Everything in the world has its reasons for doing what it does

“Everything in the world has its reasons for doing what it does” is Kirie’s account of the agency she sees in ordinary things: even a stone or the wind may act with a purpose, unsettling people and leaving them changed. The expression frames Junpei’s story of a kidney-shaped stone not as a puzzle to solve but as an encounter with a world whose actions exceed human understanding.

The Stone’s Quiet Purpose

In the story Junpei is composing, a methodical lady doctor uses a kidney-shaped stone as a paperweight. Each morning she finds it somewhere other than the exact spot where she left it: on her swivel chair, beside a vase, or on the floor. Her office is locked, nothing else is disturbed or missing, and the night watchman has no apparent reason to enter. The stone’s unexplained movement is the sole disruption.

When Junpei asks why it moves, Kirie answers with simple assurance that the stone has reasons of its own. She says it wants to shake the doctor up little by little over a long period, though she cannot explain why. Her playful suggestion that it wants to “rock her world” gives the stone’s disturbance a punningly light surface without resolving its mystery.

From Speculation to Story

Junpei initially feels that the ideas do not fit together: his plots do not advance until he sits at his desk and writes. But talking with Kirie makes him feel that the rest of the story may work itself out. Kirie, interested in what happens to the stone, is willing to wait; the exchange turns her claim about the world’s hidden purposes into a prompt for Junpei’s creative work.

That night, as Junpei grows sleepy, Kirie expands the idea beyond the paperweight. The wind, she says, also has reasons, and people may fail to notice its purpose until it envelops and rocks them. She extends the thought to everything, including stones: the world knows people thoroughly, though that knowledge becomes apparent only at certain moments. Her conclusion is not mastery or explanation, but that people take these forces in, survive, and deepen.

The Doctor’s Changing Routine

Over the next five days, Junpei hardly leaves the house; he stays at his desk and writes the rest of the story. The stone continues to shake the doctor, not through a single revelation but through an accumulating disturbance. During hurried sex with her lover in an anonymous hotel room, she reaches around to feel for the shape of a kidney in his back. She believes her stone is lurking inside his body, acting as a secret informer buried there, and imagines it sending messages that she can exchange with it.

Eventually, the doctor becomes used to the heavy stone’s nightly changes. At the hospital each morning, she finds it somewhere in her office and returns it to her desk. What first made her question her memory becomes part of her ordinary routine. The stone remains still while she is in the room; it wakes and moves only after she leaves and locks the door. The explanation never arrives. Instead, the repeated displacement alters the doctor’s relation to the inexplicable until surprise gives way to acceptance.

Significance

The expression gives the stone a role beyond that of a passive paperweight: its movements shape the doctor’s attention and conduct, although neither she nor Kirie can establish its motive. The story preserves that gap between action and explanation. The stone’s reasons are asserted, not disclosed; its effects are concrete, gradual, and unmistakable.

Kirie’s words also connect physical disturbance with inward change. Like wind that goes unnoticed until it rocks someone, the stone makes its presence felt through repetition. Junpei’s act of writing follows the same movement: an idea that initially seems incomplete gathers force through conversation and then develops at his desk. Across both strands, the expression suggests that people may be changed by forces they cannot fully interpret, and that enduring those encounters can deepen them.