"I can do this for as long as you need me to do this." His voice is still crazy, crazy soft and controlled. Some of that is in deference to Clark, some of it is a response to what he's doing to himself physically. "I'll tell you for as long as you need me to tell you."

He's just stating facts, though. It's not... caving in or indulging Clark or even agreeing. It's not arguing. It's like saying the sky is blue or he is Batman. It just, simply, is. "I'm not sorry about what came back. What came back is you. You aren't going to be who you were, but who you are and who you will be is not something you ever, ever, need to apologize to me for." Still with fact stating.