When things are bad, we take comfort in the thought that they could always get worse. And when they are, we find hope in the thought that things are so bad they have to get better.
What's an expert? I read somewhere, that the more a man knows, the more he knows, he doesn't know. So I suppose one definition of an expert would be someone who doesn't admit out loud that he knows enough about a subject to know he doesn't really know how much.