Nothing Must Be Repeated

Nothing must be repeated.

It is not happening now,
Never is, but it was once,
Though never that way again,
By which method it repeats.
No one is in the room now,
Except you, and when you go

You will be the no one then,
Although, of course you will not,
Cannot ever go, except
Back into you where nothing
Happening now can happen,
Nothing can happen at all,
At will, which bears repeating.