Should Somebody One Day

Should somebody one day knock at your door
Announcing he's an emissary of mine,
Never believe him, nor that it is I;
For to knock does not go with my vainglory,
Even at the unreal door of the sky.

But should you, naturally and without hearing
Anyone knock, come to your door, unbar it
And find somebody waiting (it appears)
To dare to knock, give it some thought. It was
My emissary and I and the retinue of my glorying
In what drives to despair and what despairs.
Unbar to who does not knock at your door!