How to kill an angel

Firstly you must identify them by their purity.
Secondly you must throw them from the sky.
Then you must shame them.
Then you must clip their wings and shave their head.
Make them see the error of their ways.

Next you must take away its name.
Then you must sunder its hands.
Drag it through the nettles and streets.
Then allow it its last bread and wine.
Lastly you must decapitate it and burn what remains.

Only then will it know what it feels like to be one of us down here.