I was standing in the harsh Texan T shirt winter of a Walmart car park and looked up at the sun. It glowed with incandescent light through the high clouds, like an angel on its flight path down to the rigs and shopping carts parked right there on the asphalt. 
What are angels? The Angelic Doctor, St. Thomas Aquinas, teaches us that they’re purely spiritual, intellectual beings and therefore incorporeal, necessitated by the “perfection of the universe” and the nature of divine creation.
A Typical Angel
Angels, we learn, are without form and matter and exist fully actualized, beings of almost pure act. They are, however, inferior to God because they are contingent upon Him. Good stuff and you can read all about it here. But maybe this is all a bit highbrow, form and matter, species and genus, essence and existence and all of that. Let’s bring the definition down to earth by reflecting on what angels aren’t. 
Here’s a helpful infographic:
These aren’t angels, at least they’re not the good kind. Don’t ask for their help.
Vicious rumors that top Democrat Party operatives practice ritual magic and commune with demons are entirely with foundation.
Moral of the story? If you’re going to get into it with angels, choose the right sort.
God bless,
LSP