“The sense of tragedy - according to Aristotle - comes, ironically enough, not from the protagonist's weak points but from his good qualities. Do you know what I'm getting at? People are drawn deeper into tragedy not by their defects but by their virtues. Sophocles’ Oedipus Rex being a great example. Oedipus is drawn into tragedy not because of laziness or stupidity, but because of his courage and honesty. So an inevitable irony results. ... [But] we accept irony through a device called metaphor. And through that we grow and become deeper human beings.”
Book:Kafka on the Shore