Plot is the most important element of drama much as argument is the most important element of rhetoric. Tragic mimesis, for Aristotle, is imitation of a single complete action of a certain magnitude; plot is the "action" of the play. It is plot that gives tragedy its beginning, middle, and end, unity and completeness. If a plot is loo complex, the audience cannot follow it but if it is too simple, it lacks magnitude. Also, it is the events, or plot sequence of tragedy, unfolding around a character that serves to arouse fear and pity in an audience and effect catharsis.