Jacob and the angel, as told by the angel
I'm authorized to open seals, drive the chariot of fire, and pour out bowls of judgment. But wrestling someone?

In the beginning, when I was first making appearances to mortals, most of them died before I could speak the first word of truth. Just from the sight of me—they fell right over. Great burly men and women too, not like the kind you see nowadays. I mean, real antediluvian hulks with chests the size of wine barrels and legs like cedar trunks. Their consciences would seize right up; they were that certain I’d come to find them out. And they’d give up the ghost—practically flung the ghost right at me—rather than listen to a word of what I had to say.
The fear of God is the beginning of wisdom, and the distribution and installation of wisdom is the task with which all powers and principalities have been charged, not excepting myself. Fear being the operative word, and not panic, which is why most of us have learned to start each incident log with a command like “Fear not,” or “Dread not,” or “Be thou not dismayed,” or some other variation thereof; most people are full of the beginning of wisdom already, and appearing before them without some form of reassurance is liable to result in total system overload, followed shortly by shutdown.
So I didn’t get much practice speaking for a while. But the help desk agreed that this was through no fault of my own, so I kept getting sent out on jobs until I could find someone who was capable of holding up their end of a conversation.