[He frowns, trying to sort through the jumble of his thoughts. He's. having trouble sorting all of it out. He thought he knew, but being here again-- everything feels all out of order, or missing. He...]
Keith, I'm sorry. I... I know that doesn't change anything, but-- I am. [He knows it's painfully inadequate. It doesn't even come close to expressing just how utterly horrified he is by what he's done. What he is.]