On the Shakespeare Measurement Scale, we measured the goodness and evil of the scale and Angelo was displayed on both sides. For centuries, scholars have always believed that Angelo is a moral person or evil person. Scholars who support Angelo as a moral concept often quote the fact that the Duke clearly trusts Angelo. On the other hand, some people think that Shakespeare draws Angelo as a purely evil person. These critics stress the treatment of Angelo's Marianne, and Duke may doubt it
In "Measurement", Duke of Vienna announced that he was on vacation and appointed Courtier Angelo to represent him. Angelo faced the challenge of bringing order to Vienna, a moral sagging. He is known for its purity and faithfulness, but he does not know that he is testing him because he knows he has a dark secret in the past. A young man, Claudio, was sentenced to death for crimes of adultery in prison. His charming sister Isabella is trying to be a nun and goes to Angelo to defend the lives of her brothers. Angelo overcomes her desire and tells her that if she sleeps with him, he will have a Claudio's life. Isabella threatened to expose him, threatening to hide himself with his strong position and a pure reputation, no one would believe the accusation of an unknown young woman to his identity and reputation.
Why Isabella can not convince Angelo to allow Claudio's life? Isabella 's article "Measuring Measurements" by Bernice Kliman said it was because it did not use the rhetoric of the formula established by Herrennium which is one of Shakespeare' s measurement methods. But is the description of Isabella by Kleemann true or is it colored by a literary comparison she chose? Kleemann analyzed Isabella trying to convince Angelo to rescue their comparisons with brothers 'lives (2.2 and 2.4), other scenes in Isabella' s play, and Epiti and Advertisement Herennium with Cassandra. Kleeman used the advertisement Herenium (and Minimal Aristotle) to outline how persuasion should be most effective in rhetoric. Epitia and Cassandra firstly call for mercy, then reveal "innocent circumstances", and ultimately cause judges' sympathy and constitute an argument.