What is the theme in Morality Play by Barry Unsworth?

Identity vs. false identity is another theme in the book. A principal theme in this book is true identity verses false identity. To address this theme, the author explores the chasm between appearance and reality. Unsworth first introduces this theme in Nicolas's realization that the players carry out certain roles even outside the bounds of a play. He points out that everybody is burdened by certain expectations cast by others. In fact, they are even expected to recite certain lines in response to each other. Nicolas notes that everyone has a role except Margaret. Margaret has neither an onstage, nor an offstage, role.