For a thousand years, the Bible was almost the only book people read, if they could read at all. The stories that were officially told and portrayed were Biblical and religious stories. That other fount of Western civilization as we know it today the Greek classics went largely unknown until the Renaissance. For our purposes, there's a noteworthy difference between these two literatures: in the Bible people are hardly ever said to be mad as such, whereas in Greek drama they go off their rockers with alarming frequency. It was the rediscovery of the classics that stimulated the long procession of literary madpeople of the past four hundred years.