"No, they don't make much sense, but that's th'human condition. We're two sides of th'same coin. You're a being which was once not human, but is now, and I'm a being that was once a human, but now isn't." He often said he was human, with a disease, but the further into studying vampirism he'd gotten, the less convinced that was the case.
He shrugged. "So you didn't fail him, he just needs to go on his quest alone for a while. You taught him somethin' he needed to know, and you did your job to th'fullest extent you could. You should be proud of that."