[The Doctor's stubborn side rears its head and he can't help but huff.]

That's what I'm there for. So one else has to. [But he didn't want to talk about himself and his martyrdom qualities. This isn't about him.] What I'm trying to say is that you shouldn't have ever be put in that position, Clara. And it's my fault. I should have noticed sooner I should have done something. Anything to avoid this.