Wasn't (Isn't): Moment

In a moment
In a life
In a thought there is a
Moment where you can
Change your life.
Imagine what wasn't
As if it had been.
Imagine what isn't
As if it were.
In that moment of thought
There can live a lifetime
In that lifetime there can be
An alternate life.
That wasn't.
That isn't.
But could have been.