Let us now praise obsessed people, at least those who are obsessed about the right things. The death of Simon Wiesenthal is a reminder that evil not only exists, it is relentless, so those who recognize it must be relentless, too. Wiesenthal could have had a more normal life, but he dedicated himself to the fight against forgetting. So it's our job to carry on, at least to the extent of remembering. He and others like him were remarkably successful and chasing down the Nazis, but there will always be more like them, too.