Whenever the world turns
From what it has been
Into what it will be,
And thus earns a different past
And a different future,
There is a brief moment
When every possible kind of universe,
All possible extensions of Being
In space and time,
Are poised on the threshold
Of becoming,
Before all but one
Pass into nonexistence again;
And the world is
As it is
And not as it was,
And everyone in it forgets
That it could ever be
Or has ever been
Other than
The way it is.
POSSIBILITY