To study angels is to shed light on ourselves, especially those aspects of ourselves that have been put down in our secularized civilizations, our secularized educational systems, and even our secularized worship system. By secularization, I mean anything that sucks the awe out of things.
When you take a dirty floor ... and make it spotlessly clean, and this polish it until it shines, it radiates back to you the love which you poured into it; the divinity of that floor has been drawn forth.