"Don't you dare try to tell me what I can and cannot do, miss Swann! Surrounded as I am by people whom I wouldn't trust with a broken wooden knife, I can and will doubt anyone and everyone. And you -are- a liability if your mind and your heart are elsewhere, no matter how well you can fight."

He eyes her. His voice all through the little tirade has been level, but cold. He doesn't trust her, and doesn't really believe she'll be up to the work ahead. Changed, she has, but maybe not enough. And as long as she doesn't make up her mind, she will very much be a liability for herself and everyone else. And if he has to prod her until she blows up for her to realize, he will.