The little shit was really working on his nerves but he did his best to quell down the way it gets his back up. He breathes out softly, hiding what he can so the other doesn't see how he nearly rises to the bait.

"It's not that I doubt His power so much as I doubt You. If he were going to speak to anyone it would be me not some worthless, egotistical little mirror brat. You aren't even the Real Thing. I'm his Son. You are a COPY of a man who is part of a parasitic race of destructive and flawed beings."

Alright, so his emphasis in his ranting is a dead give away but he's approaching the other, stalking forward and squaring his shoulders as he bares down on him.