In the play Othello, by William Shakespeare, the most powerful themes revolve around emotion. The emotions presented play a vital role and help to establish the plot. They also lead to the explanation of the characters' actions throughout the events in the play. The characters' anger, which is brought about by pure jealousy, is the backbone of the storyline. The emotions are triggered to reflect how one man's first encounter with evil was brought about, and the measures he takes in response to the encounter. Othello runs parallel to the theme of anger and jealousy during the encounters of evil, as shown through analyzing actions of Iago as he corrupts Othello for personal gain, through Roderigo as his jealousy towards Iago becomes more apparent, and through Othello as he becomes overwhelmed in anger towards Desdemona.
             Iago's anger towards Othello leads to jealousy which in turn spawns his evil into a plan to corrupt Othello's mind for his own personal gain. Iago loved Desdemona, which led to his hatred towards Othello who was married to Desdemona. "I hate the Moor, and it is thought abroad that 'twixt my sheets he's done my office" (I, iii, 362-364). Iago feels he should be married to Desdemona, and that everyone knows that they were supposed to be together. This anger towards Othello causes him to falsely convince Othello that Cassio and Desdemona are having an affair. "Look to your wife. Observe her well with Cassio. Wear your eye thus, not jealous nor secure" (III, iii, 198-199). Iago urges Othello to watch Desdemona's every move when she is with Cassio, and not to be overconfident that everything that happens between them is innocent. Iago's anger reigns so strong that he can even manipulate Roderigo into his plans. Iago forced Cassio into thinking that Desdemona was having an affair with Roderigo. "Now my sick fool Roderigo, whom love hath turned a...