Angels are forms, images and expressions through which the essences and energy forces of God can be transmitted; and, since there are an infinite number of these forms, the greatest service anyone can pay the angelic host is never consciously to limit the ways angels might appear to us.
Probably one of the first strokes of grace in my life is my father's become totally paralyzed when I was eight years old, because it led me to become the kind of person I am now. Sometimes we understand grace only in retrospect. If someone were to ask me what grace is, I would probably respond, "It's all grace."