Candida Moss wrote a really nice piece for the Daily Beast about the supposed angel priest who showed up at the site of a car wreck. (I wrote about the angel priest here.)
Moss’ story goes on to talk about the modern cultural perception of friendly, pretty angels who are at our beckon. She explains that angels can be terribly frightening when encountered by humans. And she reminds us that they are part of God’s army with the power to destroy people, demons, and cities. You can read her article here.