He'd like to add that Castiel should know that, but then, his brother probably didn't. Ugh. This sucked.
"Let's not go thinking other-you is human and could very likely go blind at seeing me. He might not, but I'd rather not test that theory out. Can't you two - I don't know, get along for once and work together?" Pause. "Damn I hope I never meet another me. I bet we wouldn't get along either."