Remus' smile was anything but mirthful. "I know that here," he said as he tapped his temple, "but here?" He moved that same hand down to lay his palm over his heart. "...Some nights will always be like that. I made... I made enemies doing what I did, because I believed in what we, as wizards, were doing. Trying to keep the world safe from him, by keeping the werewolves out of his hands. But I had nothing on Greyback's influence."