You are a Shit Spotter. It's satisfying work. … We have observed that most of the trouble in the world has been caused by ten to twenty percent of folks who can't mind their own business, because they have no business of their own to mind, any more than a smallpox virus. Now your virus is an obligate cellular parasite and my contention is that evil is quite literally a virus parasite occupying a certain brain area which we may term the RIGHT center. The mark of a basic shit is that he has to be right. And right here we must make a diagnostic distinction between the hard-core virus-occupied shit and a plain, ordinary, mean no-good son of a bitch. Some of these sons of bitches don't cause any trouble at all, just want to be left alone.

The Place Of Dead Roads (1983), p. 155