Explaining who we are to a dear friend

Imagine a perfect glass floor.
Imagine an endless supply of marbles.
Imagine that the floor is endless.
Imagine that one marble falls from nowhere and lands somewhere on the floor.
When it hits, it strikes another marble, and another and another.
Each of these marbles in turn strikes other marbles.

Now imagine that you are the space around the marbles.
Every marble that drops, changes the shape of who you are.
Every tiny change precipitates and endless series of other changes, none of which are completely predictable.
Very quickly, you aren’t at all who you thought you were.

Soon, it’s hard to remember where you started.

The marbles keep falling.
Rolling. Bouncing. Striking each other.
Changing the space around them.